The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

The abandoned ruins of a failed resort hide on this verdant, picture-perfect island.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

An alien church provides much needed silence in the midst of a Finland shopping center.

This church also serves as a lighthouse complete with a beacon.

A small island dotted with old, historic Finnish buildings.

An abstract monument to a symphonic composer.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

It houses the remains of a 17th-century version of the Titanic.

An ancient octagonal weather station named for the eight Greek gods of wind.

This legendary city has been a tourist attraction for centuries.

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

Monasteries on rock pillars, once accessible only by frayed ropes.

The "dragon babies" of southeastern Europe.

A whimsical bridge adorned with decorative dragons.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.