The coastal erosion creates sea stacks, caves and arches that make for a unique experience.

This building technique took the abruptly ending plateau rise of mountains and dug into the steep walls to create caves.

The River Dart has created several caves along its fringes.

The Karst terrain created caves that were not always connected with each other.

Violent waterfalls spilled over the ice, creating caves at the base that were dangerously inviting.

Inside, workers have created caves in which the animals seek shelter from the heat and sun.

The Hohlenstein cliffs are made of limestone which was hollowed out by natural causes to create caves.

Karst processes created numerous caves and grottoes in this area.

River erosion often creates beautiful, deep gorges and wonderful caves.

Through landslides, granite blocks pile up at the base of the cliffs and create open spaces or "caves".