Crater

Cave in Russia.

Crater

Flooded cave (known as the Blue Grotto) on the island of Capri in southern Italy.

Crater

Cave in Puglia region, Italy.

Crater

Cave in the Hebrides.

Crater

Cave in France noted for its prehistoric paintings.

Crater

Cave in France.

Crater

Named after the Cave with underground river in France.

Regio

Named after Johann Regio - Austrian astronomer, discovered Ida (1848-1925).

Regio

Place where Palisa (discoverer of Ida) observed.

Crater

Large cave in Slovenia.

Crater

Karst cave in Sulmona, Italy.

Regio

Where Palisa discovered Ida.

Crater

Lava tube in Spain.