Elevated freight railway turned wildly successful urban park.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

The celebrated eyesore created by starry-eyed sweethearts.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

This Parisian gem is one of the most incredible ethnographic museums in the world.

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

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

A French artist's vague warning hangs over Belleville.

This bridge was constructed from the rubble of the infamous Bastille.

The world's largest reflecting pool is just two centimeters deep.

The world's tallest bridge is also possibly the most elegant.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

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.