Voyay walking tour

Chasing Cold, Stars, and Revolt

From frozen helium to starlight and defiant student voices

Leiden, Netherlands
12 stops
142 min
3.3 km
History

Free in the Voyay app

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Leiden hides world-changing science behind canal houses, garden walls and university doors. This walk follows the people and places that made electrical heartbeats visible, liquefied helium and transformed humanity’s understanding of the cosmos. Along Rapenburg and Witte Singel, you will move between scientific instruments, the Old Observatory’s domes and the laboratory once celebrated as the coldest place on Earth. The city itself becomes the campus, with bridges, courtyards and public streets connecting research to everyday life. The same route also reveals a university repeatedly challenged by its students and professors. Hear how Cleveringa’s protest helped trigger a wartime strike, then visit the Academy Building occupied by students demanding democratic reform in 1969. This tour is ideal for science enthusiasts, university-history fans and curious walkers who prefer discoveries and debate to conventional sightseeing. Interiors enrich the journey when open, but the essential stories remain visible from public streets, squares and canal banks.

Try the first stop

Free sample · Stop 1

Rijksmuseum Boerhaave

Meet Leiden’s scientific instruments, from stargazing tools to world-changing cryogenic machines.

Begin among the brass, glass and copper tools that made invisible phenomena measurable. Displays illuminate how Leiden researchers studied starlight, heart signals and temperatures near absolute zero. The instruments also reveal a collaborative scientific culture built by researchers, students, glassblowers and technicians rather than isolated geniuses.

The route

12 stops, in order.

Stop 1 · Free sample
Rijksmuseum Boerhaave
Meet Leiden’s scientific instruments, from stargazing tools to world-changing cryogenic machines.
Stop 2
Pieterskerk Leiden
Enter the ceremonial church where Leiden’s university story first took public form.
Stop 3
Kamerlingh Onnes Building
Stand where liquefied helium unlocked superconductivity and made Leiden famously cold.
Stop 4
Van der Werfpark
Discover a peaceful park created by Leiden’s most violent chemical catastrophe.
Stop 5
Rapenburg
Follow Leiden University’s canal-side spine of ceremonies, laboratories and public dissent.
6
Stop 6
Johan Huizinga Building
Find the former laboratory where electrical heartbeats became precise, readable measurements.
Stop 7
Cleveringa Square
Meet the student landscape commemorating a courageous stand against Nazi persecution.
Stop 8
Leiden University Library
See how centuries of scholarship expanded beyond Rapenburg into a modern research machine.
Stop 9
Witte Singel Viewpoint
Frame the Old Observatory’s domes across water beneath Leiden’s changing sky.
10
Stop 10
Academy Building
Enter Leiden’s charged heart of academic ritual, wartime resistance and student occupation.
11
Stop 11
Plexus Student Centre
See how student revolt evolved into representation, services and organized campus life.
Stop 12
Old Observatory
Explore the domed birthplace of Leiden’s influential astronomy and cosmological imagination.