Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

Only a fragment of this 15th-century Dance of Death survives today.

A lush indoor jungle fills this bustling Madrid transportation hub.

One of the most well-preserved temples of ancient Egypt.

The Andean town where every single building is decorated with a brightly colored frieze.

Something's watching you.

A collection of items from a way of life that no longer exists.

A stunning 18th century pharmacy and medieval chemist's collection.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

To gaze upon the visage of Sri Lanka's biggest Buddha, one must first pass through the Tunnel of Hell.

Home of Howard Hughes' Spruce Goose.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.

Stained glass windows bathe this botanical garden in cosmic light.

A strange house built only at night, with rumored mystic inspiration.

An extraordinary collection of 18th century anatomical waxworks.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.