According to a local legend, this old castle could only be built after a woman was immured in the walls.

In this town's main square resides a statue of none other than the 43rd President of the United States.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

Ruins of a 13th-century fortress perched above a breathtaking Mediterranean bay.

The hallucinogenic center of the ancient world.

Gargoyle head that brings good luck.

An ancient knight and a symbol of the city's freedom.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

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

Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

UNESCO-protected ancient burial ground.

A striking symbol of the Bulgarian capital.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

These fantastically named natural pools look like something out of a Scottish myth.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Sofia's legislative center is continuously reinventing itself.