66,000 pieces of art, donated by one of the world's richest men.

Brussels' favorite peeing boy has a sister.

Cozy basement bar sports an inventory of over 2,000 beers.

Ruins of a once-opulent grand Victorian resort.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

The only castle in North America to ever house European sovereigns.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The oldest operating pharmacy in the world features 800-year-old recipes.

A little sculpture with a large wardrobe.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Gargoyle head that brings good luck.

Climb inside an iron crystal magnified 165 billion times its normal size.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

Historic funicular railway, believed to be the shortest railroad in the world.

Commonly acknowledged as the only public monument to the Devil himself.

Two stunning 17th-century libraries and a cabinet of curiosities.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

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