This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

A small town celebrates its cash crop with a giant highway sculpture.

The tallest tower in Cáceres's Old Town.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

Fragments of human bones are embedded in the walls of this quaint alley.

This star-shaped military outpost is now simply trying to protect itself from neglect.

This enormous censer uses a pulley system installed over 400 years ago.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

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

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

Remnants of successive wars and Muslim colonialism in the 11th century.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

1513 Turkish world map, full of European state secrets and snarky commentary.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

This chimerical bridge/tunnel appears to dead end right into the sea.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The Bristol Camera Obscura housed in an ancient windmill.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.