Geology

One of Chile's most active volcanoes is riddled with beautiful caves.

A Gothic cathedral created from volcanic rocks.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

This extinct shield volcano is the lightning rod of the Cascades.

The second generation of a mighty volcano rises from the sea.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

The fossilized remains of ancient California redwoods.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

A legendary rocking stone, returned to its clifftop perch.

A mud volcano in Indonesia spews out 50,000 cubic meters of mud every day.

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

A very big rock just plopped down in the New England woods.

A stone face watches over the river.