A hidden three-foot-wide house separates these two regal churches.

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

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

This giant sculpture made of trash is a critique of society's wastefulness.

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

Thousands of well-dressed mummies below a monastery.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Italian cave with exceptional acoustics and an unsavory history.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A fantastic place to see murals, and an important location in the history of Toronto's legal street art scene.

This urban oasis is a marvelous meld of music and landscape architecture.

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

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This little Greek plateau is home to thousands of rustic, white-sailed windmills.

Long tunnels run under the ancient chariot racing circuit to the tower.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This famous archeological mystery may be an ancient example of movable type.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.