Picture a stone wall so perfectly formed it looks man-made — yet it's a pure geological wonder, carved by nature over tens of millions of years. Čertova zeď is one of the finest examples of a basalt dyke found anywhere in the Czech Republic, a rocky rampart left standing after softer sandstone eroded away around it.

The ridge runs NE-SW and climbs to 494 m, cloaked in pine and beech forest with patches of birch, hornbeam and rowan lower down the slopes. Along the way you'll find striking basalt formations like the Devil's Chair (12 m long, up to 6 m high) and a boulder known as the Devil's Head. The exposed rock outcrops host warmth-loving plant species, making late spring and summer especially rewarding for nature lovers, while autumn colors and quiet winter walks give the place a different, moodier charm. It's easy to see why so many devil legends grew up around this spot.

How to get there

• Junction Pod Čertovou zdí on road II/278 (Osečná – Český Dub) — yellow trail, short approach, easy difficulty
• Blue trail Kotel – Hrubý Lesnov runs directly across the wall itself, moderate difficulty

Practical information

• The area is a protected national nature monument — collecting rocks or disturbing vegetation is prohibited
• Spring and autumn are the best times to visit, when the forest canopy doesn't obscure the rock formations

Legend says the devil tried to build a wall from Ještěd all the way to Bezděz in a single night, losing the bet when a rooster crowed too early — and the last boulder he dropped is said to resemble his own head.