Rohožník, protected area in Czech Republic

Rohožník, also known as Lom v Dubči, is a protected natural monument covering approximately 3.37 hectares and consisting of two parts: a high ridge and a small quarry at the edge of Dubeč. The main hill rises to 279 meters above sea level and is composed of Ordovician quartzites, with exposed rock walls that reveal millions of years of geological deformation.

The hill's old name Rohozný vrch came from the Old Czech word rohoz for the reeds in the surrounding marshes. Archaeological research in the 1950s found pottery left by nomads, and the site was declared an archaeological cultural monument, which likely saved it from complete quarrying. A settlement stood here from about 2000 BC into the hillfort period, and stone was quarried intensively in the 19th and 20th centuries.

The name Rohožník derives from old Czech and refers to reed grass that once grew in marshy areas around the hill. The site shows traces of human settlement dating back over 4000 years, evident from pottery fragments discovered during archaeological excavations.

The quarry area is fenced and not open to the public, but the summit of Rohožník with its exposed rock patches can be viewed from the perimeter. A marked blue trail connects the surrounding area and allows visitors to explore the landscape and rocky formations at their own pace.

In the smaller quarry, the folded rock layers form a clear M-shaped fold, while the massive quartzite bed in the neighbouring quarry resisted this folding. Stone from Rohožník was once cut into setts (kočičí hlavy) that paved much of Prague; only a few streets still keep them.