Cavernicole Cave

The Cavernicole Cave or la caverne de Saint-Léonard is a cave on the island of Montreal, in Quebec, Canada. It is located underneath Pius XII Park (Parc Pie-XII) in the borough of Saint-Leonard in Montreal. It is a registered historic site with restricted access and guided tours.

History
The cave was discovered in 1812. During the Patriote Rebellion of 1837, it served as an armoury, weapons cache, and hidey-hole for Les Patriotes. In 1968, the government deemed it a safety risk and closed off the cave. In 1978, the Quebec Speleology Society reopened the cave for study. It was subsequently declared a historic landmark, and tours were set up.