Two stone columns flank the grand Venice square, but there were supposed to be three.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

A military museum, art park, mausoleum, and architectural oddity all on one fascist's estate.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

Flamboyant architecture from the turn of 20th century.

Stockholm's narrowest alley is barely over two feet wide.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This small cemetery and its chapel are located in the middle of a traffic circle.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

The unfinished final resting place of some of Spain's most prominent politicians.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.