Balm ruins

About

The Balm ruins (Ruine Balm or Ruine Balmfluh) are the remains of a fortified cave dwelling at the foot of Balmfluh (alternative spelling: Balmflue) in the Jura Mountains, in the municipality of Balm bei Günsberg in the Canton of Solothurn. It is that canton's only cave stronghold and one of the few in Switzerland. It is a Swiss heritage site of national significance.

Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.