City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

The private island of Yale's elite Skull & Bones society is kind of a dump.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

These locks on North America’s oldest canal are named after a porcine rock formation.

A sprawling Victorian farm that has been surrounded by a capital city is one of Canada's greatest treasures.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

Morocco's Argania trees are infested with nut-hungry goats.

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

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

Breathtaking and huge 430 year old maps of Italy.

Erotic art covers the walls of the largest ancient pleasure palace.

Pompeii's less famous neighbor is still revealing her secrets.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Five candy-colored villages on the Italian Riviera.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Replicas of Apollo's leonine stone guard cats still line a sacred row in Greece.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.