Birkelhöhle, Natural cave in Heidenheim an der Brenz, Germany.

Birkelhöhle is a 51-metre-long fissure cave about 2.5 kilometres east of Heidenheim an der Brenz, in the Buchschorren woodland near the Bohnerzgruben pits. It runs horizontally through Jurassic rock and has a keyhole-shaped profile. The cave is safe to walk through.

The Birkelhöhle is a 51-metre-long fissure cave that runs horizontally through the Jurassic limestone of the Buchschorren forest, about 2.5 kilometres east of Heidenheim an der Brenz. Its passage has a keyhole-shaped profile and can be entered without climbing equipment. The surrounding woodland also holds former iron-ore pits (Bohnerzgruben), which point to the area's mining past.

The cave lies in the Buchschorren forest, about 2.5 km east of Heidenheim an der Brenz, close to old iron-ore pits (Bohnerzgruben). Its name, Birkelhöhle, is the local name for this 51-metre fissure cave in the Jura rock. Visitors reach it on foot through the forest; there is no visitor infrastructure.

Bring your own flashlight since the cave has no artificial lighting and the ground can be slippery in places. Wear sturdy shoes with good grip to safely navigate the uneven and damp surfaces inside.

The cave connects to hiking trails that lead past historic iron ore mining sites in the surrounding area. This connection reveals how geology and mining activity shaped the region's past.