This unreal Portuguese palace looks as though it's made from a pile of different castles.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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

Elaborate tile work in this railway station tells the story of Portugal.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The stunning interior of this Gothic church is covered in ornate gold details.

Ancient catacombs form the foundation for this Rococo orgy of a church.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A medieval weapon rumored to have been used by the brilliant poet himself.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Stairs often replace streets on the steep slopes of this old mining town.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

This historic national park is covered in the stunning ruins of red rock pueblos.

A Wild West jailhouse that slid down the mountainside.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

The palatial McDonald's that inspired Wesley Willis.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Illegal drag racing two stories beneath Chicago’s streets.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.