VIKING DESTINATIONS • SWITZERLAND
Basel: A Bicycle Ride into History
Basel has the Rhine, a gorgeous Old Town and a wonderfully Swiss sense of order. Yet as I wander its streets, my schoolboy imagination keeps returning to a certain chemist’s unforgettable bicycle ride on 19 April 1943.
By Rob Wheatley – Program Director & traveler | Updated October 2026
Basel, where my schoolboy imagination takes a bicycle ride
I can be strolling through Basel, admiring its immaculate Swiss streets, red sandstone buildings and the Rhine rolling majestically past, when a rather mischievous thought pops into my head. I start chuckling to myself. Not because of a shop window, or the price of a Swiss coffee, but because somewhere in this extraordinarily civilised city a chemist once got on his bicycle and set off on what must rank among history’s most bewildering journeys home.
Basel has all the ingredients of a respectable Swiss city: centuries of history, wonderful art, a cathedral, trams that know where they’re going and people who appear to have everything under control. Which makes the story of Albert Hofmann and 19 April 1943 all the more irresistible to my inner schoolboy.
Basel has all the ingredients of a respectable Swiss city: centuries of history, wonderful art, a cathedral, trams that know where they’re going and people who appear to have everything under control. Which makes the story of Albert Hofmann and 19 April 1943 all the more irresistible to my inner schoolboy.
A little experiment that went rather further than planned
The chemist was Albert Hofmann, working for Sandoz in Basel. In 1938 he had first synthesised a compound called lysergic acid diethylamide — LSD-25 — while researching substances derived from ergot. The compound did not initially appear especially promising, and it was set aside.
On 16 April 1943, while working with it again, Hofmann experienced an unexpected altered state. He believed he had somehow absorbed a tiny amount accidentally, although precisely how the exposure occurred remains uncertain. Being a scientist, he wanted to understand what had happened. Three days later, on 19 April, he deliberately tested the substance on himself. He took what he thought was a cautious experimental amount. It wasn’t. The Swiss National Museum recounts the episode.
On 16 April 1943, while working with it again, Hofmann experienced an unexpected altered state. He believed he had somehow absorbed a tiny amount accidentally, although precisely how the exposure occurred remains uncertain. Being a scientist, he wanted to understand what had happened. Three days later, on 19 April, he deliberately tested the substance on himself. He took what he thought was a cautious experimental amount. It wasn’t. The Swiss National Museum recounts the episode.
Bicycle Day: the most extraordinary commute in Basel
As the effects intensified, Hofmann became anxious and asked his laboratory assistant to accompany him home. Wartime restrictions made bicycles the practical choice. So off they went, pedalling through Basel while the world, to Hofmann, seemed to be doing things that streets, buildings and ordinary objects have absolutely no business doing.
Here my imagination takes over. I picture a thoroughly Swiss street, a tram gliding by, perhaps the Rhine somewhere beyond the rooftops — and a man wondering whether the universe has quietly slipped a gear. The trams, I suspect, were running perfectly well. It was the passenger on the bicycle whose sense of reality had departed from the timetable.
For the record, we do not have evidence that he passed particular landmarks such as the Münster or Mittlere Brücke, so those are images in my mind, not a reconstruction of his route. Hofmann himself recorded the journey home by bicycle. His experience was deeply unsettling, with visual distortions and fear, and it later became commemorated as Bicycle Day. Read the Swiss National Museum’s historical account.
Here my imagination takes over. I picture a thoroughly Swiss street, a tram gliding by, perhaps the Rhine somewhere beyond the rooftops — and a man wondering whether the universe has quietly slipped a gear. The trams, I suspect, were running perfectly well. It was the passenger on the bicycle whose sense of reality had departed from the timetable.
For the record, we do not have evidence that he passed particular landmarks such as the Münster or Mittlere Brücke, so those are images in my mind, not a reconstruction of his route. Hofmann himself recorded the journey home by bicycle. His experience was deeply unsettling, with visual distortions and fear, and it later became commemorated as Bicycle Day. Read the Swiss National Museum’s historical account.
An extraordinary story, but not a travel suggestion
The humour, for me, lies in the absurd contrast: a careful chemist, a sensible Swiss bicycle, a beautifully orderly city — and a mind suddenly finding nothing orderly at all. It does not mean the experience was enjoyable or safe. Hofmann was frightened, and cycling while severely impaired was dangerous. My own Basel adventures require nothing stronger than curiosity, comfortable shoes and possibly an outrageously expensive pastry.
The Rhine: Basel's wonderfully dependable centrepiece
Fortunately, the Rhine behaves much more predictably for the rest of us. It cuts through Basel, separating Grossbasel and Kleinbasel, and gives the city its unmistakable personality. Stand beside it and watch the water traffic, the ferries and the locals enjoying the riverfront. The Mittlere Brücke is one of Basel’s great landmarks; a crossing was established here in 1226, although the present bridge dates from 1905.
I love the fact that you can be in the heart of a historic European city and still feel the river setting the pace. There is no need to rush. The water certainly isn’t taking instructions from a sightseeing timetable.
I love the fact that you can be in the heart of a historic European city and still feel the river setting the pace. There is no need to rush. The water certainly isn’t taking instructions from a sightseeing timetable.
The Old Town: history with excellent manners
Basel’s Altstadt is made for wandering. Narrow lanes climb between handsome houses, fountains appear around corners and old stone buildings seem to have been polished by centuries of careful attention. At Marktplatz, the brilliantly red Rathaus makes an entrance that even the most restrained Swiss architect might secretly envy.
Continue up Spalenberg towards the medieval Spalentor, or lose yourself among the side streets. I like a city that rewards getting a little lost. Not dramatically lost, you understand — merely enough to find a bakery you had no intention of discovering. Switzerland Tourism’s Old Town guide has a useful overview.
Continue up Spalenberg towards the medieval Spalentor, or lose yourself among the side streets. I like a city that rewards getting a little lost. Not dramatically lost, you understand — merely enough to find a bakery you had no intention of discovering. Switzerland Tourism’s Old Town guide has a useful overview.
The Münster and the view that stops me talking
The red sandstone Basel Münster rises above the city, its twin towers and patterned roof giving Basel one of its most distinctive silhouettes. Its history stretches back many centuries, with Romanesque and Gothic phases, and the humanist Erasmus of Rotterdam is buried here. Behind the cathedral, the Pfalz terrace overlooks the Rhine and Kleinbasel.
This is the kind of view that interrupts my running commentary. Briefly, at least. From up here the city looks so composed that I cannot help thinking again of Hofmann’s remarkable afternoon. Basel has probably never looked more reliable to anyone than it does to me standing here with both feet firmly on the ground.
This is the kind of view that interrupts my running commentary. Briefly, at least. From up here the city looks so composed that I cannot help thinking again of Hofmann’s remarkable afternoon. Basel has probably never looked more reliable to anyone than it does to me standing here with both feet firmly on the ground.
Art, ideas and a city that thinks for itself
Basel is not merely an attractive stop on the Rhine. It has an extraordinary cultural life. The Kunstmuseum Basel is a major reason to visit, and the city’s museums range from history and design to contemporary art. Its university, founded in 1460, is Switzerland’s oldest. Over the centuries Basel has been a place of printing, scholarship, trade and scientific enterprise.
That intellectual heritage gives the Hofmann episode another dimension. It is one episode in a much larger story of research and discovery — including unexpected discoveries that forced scientists to ask entirely new questions. I enjoy that side of Basel almost as much as its cobbled lanes.
That intellectual heritage gives the Hofmann episode another dimension. It is one episode in a much larger story of research and discovery — including unexpected discoveries that forced scientists to ask entirely new questions. I enjoy that side of Basel almost as much as its cobbled lanes.
Three countries within easy reach
Basel sits close to the meeting point of Switzerland, France and Germany. That makes it a useful gateway for wider European journeys, with rail connections in several directions and an international airport serving the region. The border geography also gives the city a rather cosmopolitan character: Swiss in its civic identity, but constantly in conversation with its neighbours.
It is tempting to treat Basel merely as the place where a journey begins or ends. I would resist. A city that combines medieval streets, world-class art, a great river and one of science’s strangest bicycle stories deserves at least a proper wander.
It is tempting to treat Basel merely as the place where a journey begins or ends. I would resist. A city that combines medieval streets, world-class art, a great river and one of science’s strangest bicycle stories deserves at least a proper wander.
My favourite Basel walk — entirely under my own steam
Start in the Old Town at Marktplatz and admire the Rathaus. Wander up Spalenberg and, if time allows, continue to Spalentor. Work your way towards Münsterplatz, step inside the cathedral and enjoy the view from the Pfalz terrace. Then follow the Rhine towards the Mittlere Brücke, cross over and look back at the old city from Kleinbasel.
With another day, add the Kunstmuseum or a second museum that catches your fancy. Leave time for a café and some people-watching. Basel is best experienced as a city, not as a collection of things to tick off. And yes, if you see a cyclist, you are allowed a private little smile — just don’t assume he’s recreating history.
With another day, add the Kunstmuseum or a second museum that catches your fancy. Leave time for a café and some people-watching. Basel is best experienced as a city, not as a collection of things to tick off. And yes, if you see a cyclist, you are allowed a private little smile — just don’t assume he’s recreating history.
Basel and Viking river cruises
Basel has a particular connection to my working world: it is an important operational hub for Viking’s European river cruising, and a familiar embarkation or disembarkation city on Rhine itineraries. Depending on your journey, you may be arriving from the airport, transferring to the ship or preparing for an onward hotel stay. Ship berths and excursion arrangements can vary, so check the details for your sailing.
My suggestion is simple: if you can give Basel additional time, do. It is much more than a convenient place to join a ship. The Old Town, the Rhine and the museums reward a relaxed visit. And if you have just crossed half the world to get here, it seems a shame to see only the road between the airport and the gangway.
My suggestion is simple: if you can give Basel additional time, do. It is much more than a convenient place to join a ship. The Old Town, the Rhine and the museums reward a relaxed visit. And if you have just crossed half the world to get here, it seems a shame to see only the road between the airport and the gangway.
A cinematic glimpse of Basel
Before you arrive, enjoy this atmospheric aerial look at Basel — its historic rooftops, the Rhine and the cityscape that makes wandering here such a pleasure. The film is a visual introduction to the real Basel; the extraordinary Bicycle Day story is one to carry in your imagination as you explore.
Questions worth answering
What is Bicycle Day? It is the informal name for 19 April, commemorating Albert Hofmann’s 1943 bicycle journey home in Basel during his first deliberate LSD self-experiment.
Was Hofmann’s ride a pleasant experience? No. His own account describes fear and intense perceptual distortions. The story is historically remarkable, not a recommendation to imitate it.
Can I walk around Basel’s Old Town? Yes. Many highlights are close together, though cobbles and hills can make some routes demanding.
Is Basel worth an extra night before or after a Rhine cruise? Absolutely. The Rhine, cathedral, Old Town and museums can comfortably fill additional time.
Is Basel in Switzerland, Germany or France? Basel is Swiss, situated very close to both the French and German borders.
Was Hofmann’s ride a pleasant experience? No. His own account describes fear and intense perceptual distortions. The story is historically remarkable, not a recommendation to imitate it.
Can I walk around Basel’s Old Town? Yes. Many highlights are close together, though cobbles and hills can make some routes demanding.
Is Basel worth an extra night before or after a Rhine cruise? Absolutely. The Rhine, cathedral, Old Town and museums can comfortably fill additional time.
Is Basel in Switzerland, Germany or France? Basel is Swiss, situated very close to both the French and German borders.
Planning beyond this visit? Then use my Switzerland travel guide to choose your next stops and build a journey that fits your time.
A final thought — and a small private chuckle
When I leave Basel, it is the cathedral, the Rhine and the graceful streets that stay with me. But somewhere in the back of my mind is that extraordinary April afternoon in 1943: a chemist on a bicycle, trying to get home while his perception of the world came spectacularly unstuck.
I don’t need the world to bend or the tram wires to dance. Basel is interesting enough exactly as it is. Still, every now and then, my schoolboy imagination insists on another quiet chuckle. And that, I think, is one of the great pleasures of travel: a beautiful place can also carry a story so unlikely that you couldn’t possibly have made it up.
I don’t need the world to bend or the tram wires to dance. Basel is interesting enough exactly as it is. Still, every now and then, my schoolboy imagination insists on another quiet chuckle. And that, I think, is one of the great pleasures of travel: a beautiful place can also carry a story so unlikely that you couldn’t possibly have made it up.
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