Mönchsberg, Mountain and quarry in Jena, Germany.

Mönchsberg is a mountain and former quarry site in Jena reaching 399 meters in elevation, ranking among the higher peaks in the region. The northern slope displays a roughly 30-meter high cliff face, while the upper surface is covered with scattered trees growing on gravel ground.

From 1886 to 1967, limestone was extracted from the mountain and transported via aerial cable system to the cement plant at Jena-Göschwitz. This industrial infrastructure linked the mountain to the city's manufacturing operations for nearly a century.

Pupils from the Freie Waldorfschule Jena, based in Göschwitz below the mountain, formed figures, labyrinths and lettering from stones on the slope several years ago. The stone shapes lie on the ground and can be picked out among the low grass and gravel.

The summit plateau can be reached on foot from Winzerla and Göschwitz, and the Winzerlaer Trießnitzweg also allows motor vehicles onto the mountain. From the plateau there are views of Göschwitz, Lobeda and Maua. Paths continue to the Leutratal and the Ammerbacher Platte.

After limestone quarrying ended, the site served as a shooting range for the Gesellschaft für Sport und Technik, and in the 1990s it was briefly used as a car graveyard. The flat plateau, about 500 by 400 metres, is bounded to the north by the roughly 30-metre wall of the former quarry.