This futuristic observatory at the top of the Pyrénées offers unrivaled views.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A dazzling temple featuring a towering 12-meter golden Buddha.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Alien rock formations grown from the sands of an Australian national park.

A clear example of the process of erosion in action.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

Come for the flowers, stay for the bats!

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

These quaint French houses dangle precariously over a precipice.