Otmíčská hora, Natural monument in Otmíče, Czech Republic

Otmíčská hora is a solitary hill near the village of Otmíče in the Beroun district, rising as a landmark of the Hořovická pahorkatina. It formed from granulated lava of Ordovician diabase, and an abandoned diabase quarry opens on its southwestern side, shaping the site's character.

The site was occupied in the Eneolithic, though whether it was fortified then is uncertain. A hillfort stood here in the late Hallstatt period, and the site was used again in the Middle and Late Hillfort period. The nature monument was declared in 1986.

The hilltop held a hillfort in the late Hallstatt period, and the site was used again in the Middle and Late Hillfort periods. Visitors can still make out the remains of the fortifications on the summit, which also gives wide views to the west and southwest.

The nature monument covers 5.3 hectares on the hill's slopes, managed by the Central Bohemian Regional Office and the Agency for Nature Conservation and Landscape Protection of the Czech Republic. The abandoned diabase quarry opens on the southwestern side, where the rock face shapes the approach to the summit.

The abandoned diabase quarry on the southwest side of the hill is what gives the site its character. The rock is granulated Ordovician diabase lava, not tuff, and the quarry face is the place to look at it.