Geological Background
Bohemian Switzerland National Park — Národní park České Švýcarsko in Czech — was designated in January 2000, making it the youngest of the four Czech national parks. It covers 79 km² in the far northwest of the country, straddling the Elbe Sandstone Mountains along the German border. Directly adjacent lies the Sächsische Schweiz national park on the German side, together forming one of Central Europe's most cohesive cross-border protected areas.
The landscape's foundation is Cretaceous sandstone deposited in a shallow sea approximately 90 to 95 million years ago. As the sea retreated and tectonic forces lifted the region, the Elbe river and its tributaries carved deeply into the horizontal strata. The result is a terrain of vertical rock faces, narrow gorges (locally called rokle), isolated rock towers, and natural stone bridges formed where harder bands of sandstone resisted erosion while the surrounding material was stripped away.
Pravčická Brána — Europe's Largest Natural Arch
The most documented feature of the park is Pravčická brána, a natural sandstone arch spanning 26.5 metres horizontally and rising to a height of 16 metres above the gorge floor. It is considered the largest natural rock arch in Central Europe and one of the largest in Europe outside of the Iberian Peninsula. The arch was formed through differential erosion: softer layers beneath a resistant capstone were removed over hundreds of thousands of years, leaving the overhanging structure intact.
An 1826 hunting lodge — the Sokolí hnízdo (Falcon's Nest) — sits directly on the arch. Although visitation to the arch itself is currently restricted to protect the structure from further physical stress, the surrounding viewpoints and trail network allow close examination from multiple angles. Monitoring carried out by the park administration measures millimetric changes in the arch geometry annually to detect any accelerating movement.
Pravčická brána seen from below — the arch spans 26.5 metres and rises 16 metres above the gorge (Photo: Pudelek / Wikimedia Commons, CC BY-SA)
Flora of the Sandstone Zone
The park's vegetation is shaped overwhelmingly by substrate and topography. Scots pine (Pinus sylvestris) dominates the exposed plateau and south-facing slopes where thin, acidic soils overlie sandstone. European beech takes over on deeper soils in sheltered valley positions, while narrow gorges and canyon floors sustain a distinct microclimate: consistently cool temperatures, high humidity and low light penetration.
These gorge conditions support a flora otherwise rare in the broader Bohemian region. Hart's tongue fern (Asplenium scolopendrium) colonises shaded canyon walls, and several species of woodland moss and liverwort form continuous mats on dripping rock faces. The margins of rock towers in the plateau zone host heather communities (Calluna vulgaris) interspersed with bilberry (Vaccinium myrtillus) and cowberry (Vaccinium vitis-idaea).
Protected plant species within the park include marsh marigold (Caltha palustris), lesser spearwort (Ranunculus flammula), and several orchid taxa documented along the Elbe riverbank meadows. Direct trampling is the primary threat to gorge floor vegetation.
Wildlife of the Elbe Corridor
The Elbe river and its tributaries act as dispersal corridors for aquatic and semi-aquatic mammals. The Eurasian otter (Lutra lutra) maintains a breeding population along the Kamenice and Křinice rivers — tributaries that flow through some of the park's deepest gorges. Otter density here is among the highest recorded in Bohemia, reflecting the combination of high-quality stream habitat, fish abundance, and limited human access to gorge floors.
Among birds, the park holds nationally significant breeding populations of the black stork (Ciconia nigra), which nests in old-growth beech stands far from visitor paths and forages along river channels. The peregrine falcon (Falco peregrinus) re-colonised the park's cliff faces in the late 1990s following the Europe-wide recovery of the species after DDT-induced population collapse. Eagle owl (Bubo bubo), kingfisher (Alcedo atthis), and grey wagtail (Motacilla cinerea) are regularly observed along the water corridors.
The mammal fauna includes red deer, roe deer, wild boar and, from the early 2000s, occasional records of Eurasian lynx moving through from the Krušné hory (Ore Mountains). Bats are well represented — 17 of the Czech Republic's 28 resident bat species have been recorded within the park, using the sandstone cavities as roost sites.
Forested sandstone plateau in Bohemian Switzerland — pine and beech dominate the canopy above Cretaceous rock towers (Wikimedia Commons, CC BY-SA)
Zone Structure and Visitor Access
The park is divided into three management zones. Zone I (the core zone) covers approximately 26% of the total area and is closed to general public access; it includes the most intact forest stands and sensitive geological features. Zone II constitutes the larger buffer area where marked trails and limited forest management operations occur. Zone III, the transition zone, connects to the adjacent Bohemian Switzerland Protected Landscape Area and includes the main visitor infrastructure.
The gorge trail network — particularly the route through Edmundova soutěska and the Divoká soutěska (Wild Gorge) — involves guided boat sections where canyon width narrows to a few metres. These routes are among the most visited in the Czech national park system and require careful visitor flow management during peak summer months.
Ecological Programmes
The 2022 fire that affected approximately 1,060 hectares of the park's core zone demonstrated the vulnerability of the pine-dominated plateau to drought and extended dry periods. Post-fire monitoring has tracked natural regeneration, with early results showing rapid re-colonisation by pioneer plant species including fireweed (Chamerion angustifolium) and mosses. The park administration opted for minimal intervention in the burned zone, allowing natural succession to proceed without replanting.
Long-term water quality monitoring on the Kamenice river has been conducted since 1994, tracking pH, nutrient loads and macroinvertebrate assemblages as indicators of stream ecosystem health. Data from this series has documented a recovery in acid-sensitive stonefly and mayfly populations following the reduction of sulphur emissions in the Ústí nad Labem region after 1989.
Further information on the park's research programmes is available through the official park administration website and through the Nature Conservation Agency of the Czech Republic.