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

A six-ton wedding present for the King of the Scots.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

France's high-tech, future-themed amusement park.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This curious, round temple is the oldest still-standing marble building in Rome.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

God's Saharan sandbox of wrath.

A 12th century church completely covered in shells.