Karst spring Karst spring. Water emerging from a cave at the foot of a limestone cliff. This is the source of the River Loue, in the Jura mountains, east France. Photographed in October. Stock Photo - Afloimages
Karst spring. Water emerging from a cave at the foot of a limestone cliff. This is the source of the River Loue, in the Jura mountains, east France. Photographed in October.