Valečské sklepy Natural Monument and Protected Bat Habitat in the Karlovy Vary District

The area around Valečské sklepy was settled from the second half of the thirteenth century, and a manor house once stood close to the present-day cellars. That seat burned down in the fifteenth century, but it had already been associated with the underground passages that are now protected, and which were later taken over by the local estate brewery.

The cellars were used by the brewery until 1931, when brewing at Valeč ceased and the underground spaces were abandoned. From that point on they fell into relative disuse, but their stable microclimate began to make them increasingly important as a natural hibernation site for bats. After decades of informal use by wildlife, the Regional Authority of the Karlovarský kraj declared the site a přírodní památka (natural monument) effective from 20 December 2016, formalizing a protection status whose focus is the bat population rather than the cellar fabric itself.

The protected site sits on the eastern slope of a low, unassuming hill in the Doupovské hory, an extensive volcanic mountain range in western Bohemia. The local hill is shaped by Tertiary tephrite, a fine-grained volcanic rock associated with the broader volcanic character of the Doupovské hory, and the monument falls within the Rohozecká vrchovina geomorphological subunit.

Above ground, the landscape reads as gently rolling forested terrain rather than dramatic relief. Elevations at the cellars themselves range from 563 to 571 meters above sea level, placing them in a foothill-to-mid-slope setting. Climatically the area belongs to the mildly warm climate zone classified as MT3 in Czech usage, with mean January temperatures of minus 3 to minus 4 degrees Celsius and mean July temperatures of 16 to 17 degrees Celsius, annual precipitation of 600 to 750 millimeters, snow cover lying for 60 to 100 days a year, and predominantly eutrophic cambisol soils. The actual protection surface is only 38 square meters across three dispersed openings, but the broader 5.24 hectare protective belt frames the site within a continuous forest landscape.

Ecologically, the area carries two overlapping layers: a forest habitat above ground and a sheltered underground environment below. The forest around the cellars is a flowering beechwood in which European beech is the dominant tree, mixed with small-leaved linden and hornbeam. In the understory, conservation-relevant herbaceous plants occur, including the strongly threatened long-leaved thoroughwax, and protected species such as cowslip and Turk's cap lily. Close to one of the cellar entrances, a colony of the white helleborine orchid has also been recorded, suggesting that the microclimate near the cave mouths supports a distinctive local flora.

The protected cellars themselves are a very different kind of habitat. Their underground chambers, originally hewn for the medieval manor and later adapted for the Valeč brewery, offer stable temperatures and humidity that suit hibernating bats exceptionally well. The site's protected status, and the way the entrances have been fitted with bat-friendly grates, reflects a deliberate alignment between human heritage structures and the ecological process of bat hibernation.

The wildlife focus of Valečské sklepy is its bat community. The cellars host a stable winter population of the critically endangered western barbastelle (Barbastella barbastellus), which is the main reason the site is protected. Records collected between 2010 and 2013 added a roster of other bat species using the cellars, mostly in smaller numbers, including the critically endangered greater mouse-eared bat (Myotis myotis) and a series of strongly endangered or otherwise protected species: the northern bat (Eptesicus nilssonii), the serotine (Eptesicus serotinus), Bechstein's bat (Myotis bechsteinii), Daubenton's bat (Myotis daubentonii), the whiskered bat (Myotis mystacinus), Natterer's bat (Myotis nattereri), the common noctule (Nyctalus noctula), the common pipistrelle (Pipistrellus pipistrellus), the brown long-eared bat (Plecotus auritus), and the grey long-eared bat (Plecotus austriacus).

The surrounding woodland, while not the formal subject of the monument, provides foraging habitat for these bats, and the broader Doupovské hory context, including its status as a bird protection area, reinforces the importance of the cellars as part of a wider network of sites for protected fauna in the region.

Valečské sklepy is one of the smallest protected natural monuments in the Czech system by area, yet conservation-wise it punches well above its size. The site is dedicated to a single, sharply defined ecological function: maintaining a viable winter hibernation site for a community of bats, centered on a stable population of the critically endangered western barbastelle. Its protection was deliberately calibrated to that function, with grates across the cellar entrances designed to exclude disturbance while still allowing bats to enter and exit freely.

Its conservation status is reinforced by its location inside the Doupovské hory European significant locality and bird protection area, placing the cellars within a network of landscape-level designations that connect small-scale sites like this one to broader regional conservation planning. The 5.24 hectare buffer zone around the three cellar openings adds a spatial safeguard for the immediate surroundings, while reliance on natural microclimate rather than active management keeps the site ecologically low-intervention yet ecologically high-value.

Valečské sklepy carries a layered but quiet human history. The cellars were already tied to a local manor in the medieval period, and when that manor burned down in the fifteenth century, the underground passages survived and were later repurposed for the estate brewery. They continued to serve that role until 1931, and the cultural footprint therefore straddles a vanishing medieval noble seat and the long industrial life of a rural brewery.

The site is located within the park of the Valeč château, close to the village of Valeč in the Karlovy Vary district, an area known for both its château heritage and the surrounding Western Bohemian countryside. The cultural and natural history of the cellars have effectively merged: a set of structures made by people is now valued and protected primarily because of what those structures mean for wildlife, an unusually direct example of how built heritage can be reframed as habitat.

Valečské sklepy is a textbook example of a micro-scale protected area: an extremely small, precisely targeted site whose importance derives from a single ecological function. Its highlights are the long-term, stable presence of the critically endangered western barbastelle, a bat-friendly entrance design that balances human exclusion with animal access, and the unusual way in which a centuries-old set of cellars has become formally valued as wildlife infrastructure rather than as historical architecture.

On a wider scale, the monument is also notable for sitting inside the Doupovské hory European significant locality and bird protection area, so a small cellar complex in a château park is linked into some of the larger-scale conservation designations of western Bohemia.

Because the cellars themselves are sealed against public access and the monument's value is zootological rather than scenic, seasonality matters here mainly for the surrounding landscape and for the broader experience of the Doupovské hory. Snow cover lies on the ground for around 60 to 100 days a year in this elevation band, and winters are markedly colder than summers, with mean January temperatures around minus 3 to minus 4 degrees Celsius and mean July temperatures around 16 to 17 degrees Celsius.

For visitors interested in the wider landscape context, the warmer months offer longer days and easier walking conditions through the surrounding flowering beech forests, while winter brings a quieter, snow-dusted character to the Doupovské hory. Because the entire protected site is itself closed to entry at all times, the appropriate seasonal frame is less about the cellars and more about the forest, the château park, and the regional scenery around Valeč.