Pravčická brána national natural monument

Pravčická brána is the largest natural sandstone arch in Europe and the most iconic natural landmark of Bohemian Switzerland. This protected national natural monument sits in the far northwest of Czechia, in the Ústí nad Labem Region, close to the village of Mezná and the small town of Hřensko, right near the German border. It's a place where millions of years of natural forces carved a shape so precise that it seems almost impossible it wasn't man-made.

How did the arch form?

The story of Pravčická brána begins around 90 million years ago, in the late Cretaceous period, when the region was covered by a shallow sea. Thick layers of sand settled on the seabed, and once the water receded, they left behind extensive sandstone plateaus — a relatively soft, erosion-prone rock. Over millions of years, wind, water, and temperature fluctuations gradually wore away the weaker sections of stone within one of these sandstone massifs, eventually breaking through to create an opening all the way through the rock. That slow, patient process of erosion is what produced the arch visitors admire today.

How big is it exactly?

The scale of the formation impresses even seasoned rock-formation enthusiasts. The arch spans 26.5 metres, reaches an interior height of 16 metres, has a maximum width of 8 metres, and the rock itself is only about 3 metres thick at its narrowest point. This combination of a slender profile and imposing mass gives Pravčická brána an almost architectural quality, even though it is entirely the product of natural geological processes.

Why can't visitors walk across it?

Until 1982, tourists could walk directly across the top of the arch, but the heavy foot traffic began putting the fragile sandstone structure at risk. To prevent irreversible damage and the possibility of collapse, authorities introduced a complete ban on walking across the arch. Since then, Pravčická brána has been protected as a natural monument, and visitors can only admire it from designated viewpoints and the trails surrounding the rock.

What is its connection to culture?

Pravčická brána has long captured the imagination of writers and filmmakers. Danish author Hans Christian Andersen is said to have written parts of "The Snow Queen" while staying in this area, drawn in by the raw beauty of the landscape. More recently, Hollywood crews used the surrounding scenery as a filming location for scenes in "The Chronicles of Narnia" — the monumental rock formation fit naturally into the film's fantastical world.

What should you know before visiting?

Right below the arch, at a spot known as Sokolí hnízdo (Falcon's Nest), a historic lookout pavilion with a restaurant offers one of the best views of the formation. The surrounding area is part of Bohemian Switzerland National Park, which also features a wide network of hiking trails winding through sandstone gorges, rock towns, and scenic viewpoints. Given the site's popularity, it's worth planning a visit outside peak season or early in the morning to avoid crowds at the main viewpoints.

Frequently asked questions

Can you walk across Pravčická brána? No — walking on the arch has been prohibited since 1982 to protect its fragile sandstone structure.

How large is the arch? It spans 26.5 metres, has an interior height of 16 metres, and a maximum width of 8 metres.

Where exactly is it located? In Bohemian Switzerland National Park, near the village of Mezná and the town of Hřensko, close to the Czech-German border.

Is there somewhere to eat nearby? Yes, the historic Sokolí hnízdo (Falcon's Nest) restaurant sits right at the base of the arch with views of the formation.