• Cold underground tunnels that hold a steady 8-10°C all year, so bring a warm layer even in summer
• Comfortable shoes for cobbles, stairs and narrow passages; strollers and wheelchairs reach only the main courtyard
• Allow 1.5 to 3 hours for a visit, and arrive well ahead of closing since last entry is an hour before

Kłodzko Fortress is a vast Prussian hilltop fortification above the town of Kłodzko, with more than 1,000 years of history on the site. The upper route runs 2.5 km along ramparts, exhibitions and viewing terraces over the town.

Below ground, a 1.2 km route leads through the countermine tunnels, a labyrinth dug under the slopes. Kids who like tunnels, cannons and soldiers get the most from it.