Hřídelecká hůra, Natural monument near Lázně Bělohrad, Czech Republic

Hřídelecká hůra is a volcanic hill standing at about 398 meters on the eastern edge of Hřídelec village. It displays distinctive rock formations and geological features that make it stand out in the surrounding landscape.

A basalt quarry operated at this site until 1926, leaving behind numerous cavities and chambers throughout the rock formations. This extraction activity left a lasting mark on the hill's appearance.

The hill's name, Hůra, is a local dialect form of hora (mountain). Aragonite crystals from the quarry, honey-coloured and among the finest in the Czech Republic, were collected by mineralogists; the site lies on the Kámen trail, a geological route linking local quarries.

The quarry pit with its chambers and corridors lies in the centre of the hill; the southern and western slopes carry dry meadow vegetation, while the northern and eastern slopes are covered with sparse scrub. No marked hiking or cycling trails are documented within the protected area, so access is on foot from Hřídelec.

The quarry, abandoned in 1926, left chambers and corridors in the basalt where aragonite formed honey-coloured crystals and crystal intergrowths considered among the finest found in the Czech Republic. Black barbastelle bats winter in the artificial cavities.