Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The celebrated eyesore created by starry-eyed sweethearts.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

France's most famous cemetery, with some of its most curious tombs.

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

A fabulously bizarre surrealist sculpture by the late artist Leonora Carrington.

A massive yet whimsical statue pays homage to the art and joy of "flight."

The largest collection of artifacts from the Olmec civilization, the mother culture of Mesoamerica.

These subterranean models show Mexico City's central square during three different eras.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

The conquistador's former fortress is the oldest preserved colonial building in the Americas.

This Oaxacan town is known for its colorful fantastical creatures hand-carved by local artisans.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

The unique collection of gifts includes braids of human hair, a spoon, and a Virgin made of bread.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.