The medieval castle built as headquarters for the Pope's secretive Knights Templar.

Some 4,000 individual tiles make up this striking blue billboard from the golden age of air travel.

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

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

The corpse bride of Portugal.

One of the largest Roman settlements in Portugal.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

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

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

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

This castle has links to Portugal’s founding and struggles for independence.

Picturesque intersection of witchcraft and ancient Christianity.

This tower once served as a radar station during the Cold War.

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

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

The walls and streets of the ancient city are peppered with penises.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

A quiet Sicilian village is home to a cafe that had an important role in "The Godfather."

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

Italian cave with exceptional acoustics and an unsavory history.

Romania's triumphal arch looks out over Bucharest.