One of the largest Roman settlements in Portugal.

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

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

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

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

Step back in time at this 19th-century kiosk.

Reaching this rock formation involves a hike through rocky rapids and springs where wild turtles reproduce.

A sign marks where the two bodies of water meet.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

This World War II-era bunker hides between medieval chapels in Nijmegen's city center.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

There has been an astronomical clock on this spot since the 14th century.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

Explore the five senses depicted on this protruding Gothic window.

Something's watching you.

When this 400-year-old fountain fell into disrepair, officials covered the mess up with what looks like a giant soup tureen.

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

These spartan apartments are provided to clergymen visiting Vatican City.

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

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.