This event is in the past.It took place on September 21, 2025 at Souterrain de l'escalier du général Leclerc.
Walking Tour
Walking TourVisite libre de la cavité souterraine de l'escalier du Général Leclerc
Pontoise
Descend into a secret underground cellar carved straight into the Pontoise cliffside. This ancient cavity, discovered during 1869 staircase construction, opens its stone arches for rare self-guided exploration during Heritage Days.
underground exploration
heritage discovery
cliffside cellar
self-guided tour
Tips
🏛️"A very nice discovery in the heart of Pontoise"
Free
Visite libre de la cavité souterraine de l'escalier du Général Leclerc
Walking TourWalking TourDescend into a secret underground cellar carved straight into the Pontoise cliffside. This ancient cavity, discovered during 1869 staircase construction, opens its stone arches for rare self-guided exploration during Heritage Days.
underground exploration
heritage discovery
cliffside cellar
self-guided tour
Tips
🏛️"A very nice discovery in the heart of Pontoise"
Free
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