The fortress was never used in combat by the Czechoslovak army, as it was surrendered to Germany following the Munich Agreement in 1938.
The underground complex lies 20 to 36 meters beneath the surface.
The site includes a decommissioned 1970s-era diesel-electric power plant intended to sustain the secret fallout shelter.
Hanička is one of the few Czechoslovak fortresses that underwent significant structural modifications during the Cold War era.
The fortress features a unique ventilation system designed to protect against chemical warfare.
Tvrz Hanička is an artillery fortress built between 1936 and 1938 as part of the Czechoslovak border fortification system against Nazi Germany. The complex consists of six combat structures connected by a massive underground network of tunnels and halls. It was originally designed to house a garrison of over 400 soldiers. During the Cold War, the site was repurposed and renovated by the Ministry of Interior into a secret nuclear fallout shelter codenamed 'Kahan', though this project was never fully completed. Today, it functions as a museum showcasing pre-WWII defensive engineering and mid-20th-century bunker technology. Visitors can explore artillery casemates, infantry bunkers, and deep subterranean galleries located at an altitude of approximately 640 meters.
The entrance to the main artillery block, which clearly displays the defensive steel embrasures and heavy fortification architecture.
Bring a warm jacket, as the underground temperature remains constant at approximately 5-8 degrees Celsius year-round.
Wear sturdy, non-slip footwear suitable for walking on uneven, damp concrete surfaces.
Plan for significant walking, as the underground tour covers over 1.5 kilometers of tunnels.
Attempting to visit during the winter months without verifying the seasonal schedule, as access is restricted due to extreme weather and hibernation of protected bat species.
Generally closed during the winter months for the protection of hibernating bat populations; check the website for specific spring reopening dates.
No touching of historical equipment; stay within marked tour paths; maintain silence in confined subterranean spaces.
