Laon Underground Passages, Secrets Beneath the City : info and guided tour

Overview of Laon Underground Passages, Secrets Beneath the City

In Laon, the Laon Underground Passages, Secrets Beneath the City invite visitors to explore a network carved beneath the city’s promontory. This local history museum highlights underground spaces linked to the terrain and the early settlement of the upper town, accessible from Allée Jean Martinot and the Citadelle promenade.

The visit lets you discover galleries cut into chalk, a material found in Laon’s subsoil. These passages reflect the site’s successive uses, for movement, storage and shelter, in a town long shaped by its rocky spur. The mineral atmosphere and the depth of the site make it a unique experience.

The place is best known for revealing Laon’s hidden side, a remarkable medieval town above the landscape. Beneath the city, the underground passages show how urban development was influenced by the topography and local resources. Visitors come here to observe the structure of the galleries and understand the link between underground architecture and urban history.

Discover Laon with a private guide

A private guide can help you better understand these underground passages by placing each space in the history of Laon and the layout of the upper town. Their insight provides context on the galleries, their purpose and their relationship to the promontory, for a clearer visit with more attention to detail.