The total length of the tunnel system is approximately 25 kilometers, making it the second-largest underground network in the Czech Republic.
The tunnels were created by deepening and interconnecting the separate basements of medieval burgher houses.
One specific corridor features a natural luminescent phenomenon on the walls, often mistakenly attributed to supernatural origins.
The construction served dual purposes: providing massive storage space for merchants and a hidden escape or defensive route during times of conflict.
The underground system is structurally monitored due to its age and the weight of the city buildings located directly above it.
Jihlava's underground is a massive labyrinth of tunnels and cellars located beneath the historic center of the city. Stretching over 25 kilometers, this multi-level network covers an area of approximately 50,000 square meters. The system was created by connecting individual medieval cellars, often dug into the rock beneath burgher houses, to facilitate trade and storage. Many sections reach depths of up to 12 meters below the surface. During the 1970s and 80s, the tunnels underwent extensive reconstruction and sanitation to prevent the collapse of the buildings above. Visitors traverse a curated route that showcases the historical mining and construction techniques used over several centuries. A specific highlight of the tour is a phosphorescent tunnel section where the walls glow with a mysterious greenish light. The site is currently maintained by the city to preserve both the structural integrity of the town and its cultural history.
The glowing phosphorescent tunnel section.
Wear sturdy, non-slip footwear as the ground can be uneven and occasionally damp.
Bring a light sweater or jacket regardless of the outdoor weather, as temperatures underground remain cool throughout the year.
Check official booking portals to secure a spot in a guided tour, as group sizes are often limited for safety reasons.
Do not attempt to explore beyond the roped-off sections, as many areas are structurally unstable or closed for safety monitoring.
Closed on Mondays during the off-season; operates on a limited schedule during winter months.
No flash photography is permitted in the luminescent section; stay close to the guide to ensure safety in the low-light passages.
