Jeskyně Jáchymka, Limestone cave in Babice nad Svitavou, Czech Republic.

Jeskyně Jáchymka is a limestone cave within the Moravian Karst that extends across multiple levels carved by the Křtinský creek through Devonian rock. The system features various passages and chambers formed over millennia by water flowing through the stone.

People used the cave from prehistoric times; archaeological digs uncovered many fossil mammal bones, notably two assembled skeletons of the canid Cuon europaeus from the late Pleistocene, a world rarity kept at the Moravian Museum in Brno. In the 19th century the hermit Joachim lived in the cave, which gave it its name.

The name comes from the hermit Joachim, who lived in the cave in the 19th century. A blue-marked hiking trail from Adamov toward Býčí skála, Kostelík and Křtiny passes through the cave. In spring 2024 a peregrine falcon nested on it, and rangers temporarily diverted the trail around the cave.

A blue-marked hiking trail from Adamov toward Býčí skála, Kostelík and Křtiny passes directly through the cave, so no permit or guided tour is needed. In spring 2024 a peregrine falcon nested on the cave, and rangers temporarily diverted the trail around Jáchymka.

Two assembled skeletons of the extinct canid Cuon europaeus, from the late Pleistocene, were found here and are kept at the Moravian Museum in Brno; they are considered a world rarity. Guano from the cave was mined as fertiliser.