A flooded Mexican cave that hides a river beneath the water.

It houses the remains of a 17th-century version of the Titanic.

Meet the bronze beloved pet to a family of famous peeing statues.

The world's tallest aluminum statue is also the world's tallest image of a winged Virgin Mary.

This 12-inch-tall wooden sculpture of a winged Virgin Mary has inspired much devotion and countless replicas.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

Quito's historic, main square dates back to the 16th century.

It took 160 years to complete the most ornate church in Ecuador.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

This tiny home was originally a narrow alleyway.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

The world's brightest bioluminescent bay.

Home of the world's largest crocodile.

Come for the flowers, stay for the bats!

An island off the coast of South Australia is home to the last purebred Ligurian bees.