Hroby (natural monument)

Hroby is a small natural monument in the Czech Republic, located in the municipality of Kozmice, in the Tábor district of the South Bohemian region. It sits in the Křemešnická vrchovina highlands, roughly four kilometers east of the town of Chýnov. Despite covering only 0.1 hectares — less than a single hectare — this tiny protected area carries significant ecological weight and is also recognized as a Site of Community Importance within the Natura 2000 network.

What exactly is protected here?

The subject of protection at Hroby is an unusual landscape feature shaped by past human activity: the slope of a sunken, deeply worn path, where distinctive short-turf plant communities have developed over time. It's precisely this microclimate and soil structure that allowed an extraordinarily rare plant population to survive on such a small patch of land.

Why is this site so important?

The main reason Hroby was placed under protection is its population of the Czech spring gentian (Gentianella praecox subsp. bohemica), a critically endangered subspecies that is essentially a Czech sub-endemic. Outside the Czech Republic, it survives only in a handful of border areas of Austria, Bavaria, and Poland. Today, the species is known from around 60 sites worldwide, and Hroby ranks among the five richest of them in terms of population numbers.

According to available records, the population at Hroby is considered one of the best for this species — not just in the Czech Republic, but globally. In favorable years, hundreds to even thousands of flowering individuals can be found here at once, an impressive number given how small the overall reserve is.

Where is it located?

The reserve lies within the cadastral territory of the village of Kozmice u Chýnova, part of the Kozmice municipality. Its approximate coordinates are 49.3937°N, 14.8569°E. The surrounding area belongs to the scenic Křemešnická vrchovina, a hilly upland region in southern Bohemia, close to the historic small town of Chýnov.

Frequently asked questions

What does "přírodní památka" mean? It is a Czech nature conservation category, roughly equivalent to a small nature reserve or natural monument — typically covering a small area of exceptional ecological, landscape, or geological value.

Can visitors walk through Hroby? Given its tiny size and the fragile nature of the habitat, visits should be limited to observation from designated paths, without stepping onto the slope itself, so as not to damage the protected plant population.

When is the best time to visit? As its name suggests, the Czech spring gentian flowers in spring, making that the best season to spot its characteristic violet blooms.

How is Hroby different from a typical nature reserve? Unlike many protected natural areas, Hroby is a case where ecological value emerged from historical human intervention — the carving of a sunken path created specific habitat conditions that are difficult to replicate anywhere else.