The longest hedge maze in the world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The final resting place of the world's first nuclear reactor.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The steepest classic funicular in the world glides along a dizzying incline.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

This sublime architectural marvel is a rare example of an expressionist church.

This historic stone bridge has an entire neighborhood clinging to its sides.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

A fifth-century temple improbably built into the side of a cliff.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Tubing through a cave lit with glowworms is a magical underground experience.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

A submerged archeological park still holds the wonders of a Roman Sodom.

A battle between nature and architecture in the Cambodian jungle.

Staves, storm-calling, and of course, necropants.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Walk behind a 50-meter-high waterfall.

On Japan's Tashirojima Island, cats are king.

A small town Romanian cemetery filled with darkly humorous gravestones.