Vápenný (790 m) is a striking summit in the Ještěd-Kozákov ridge, rising quietly above the village of Jítrava. It's a place for hikers who love wild forests, limestone caves, and forgotten military bunkers rather than crowded trails.

The mountain features steep slopes with a relative height of over 250 meters, built from Devonian to Lower Carboniferous phyllitic shales, greywackes, and metadiabases, with a vein of crystalline limestone. Its slopes are covered mostly with deciduous forest — beech woods and scree forests with maple, ash, and elm — while an abandoned limestone quarry on the western slope hides the entrance to the Western Cave. In summer the beech canopy offers cool shade, autumn brings vivid foliage, and winter blankets the ridge in quiet snow, with rare bats hibernating deep in the cave. Numerous bunkers from Czechoslovakia's First Republic-era fortifications still dot the slopes.

• From Jítrava — red-marked ridge trail continuing towards Ještěd, moderately demanding due to the steep ascent
• From the Roimund castle ruins — yellow-marked trail crossing the red route in the saddle between Vápenný and Jítravský vrch, with a shortcut running almost along the contour line on the southwestern slope

• The western part of the ridge is protected as the Velký Vápenný nature reserve (24.5 ha) — stay on marked paths
• The Western Cave serves as a winter roost for protected bat species, including horseshoe bats, and is not open to visitors
• Numerous 1930s Czechoslovak border fortification bunkers remain scattered across the mountain

Fossilized remains of extinct crinoids have been found in the limestone layer on the western slope — a quiet reminder that these hills once lay beneath an ancient sea.