This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

Wander through the Corridor of Wonders in these stunning limestone caverns.

This work of engineering is imbued with elegance and ingeniousness.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

One of the holiest places in the region, devotees come to Tirta Empul to bathe in the holy spring water.

Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

The largest stone circle in Ireland.

During World War II, a number of important sculptures and paintings were moved to this castle for safekeeping.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

A 14th-century abbey founded by a forest-loving order of monks now sits in the center of a pristine nature preserve.

Though it was originally dedicated to the Hindu god Shiva, Baphuon was converted to a Buddhist temple in the 15th century, complete with a massive hidden statue.

These ramparts, once lined with towers, were constructed in defense of Beaune.

This weird, elephant-shaped rock also hosts two ancient tombs.

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

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

A remarkable feat of Victorian engineering across the Firth of Forth.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

A snow-white church overlooking the wonderful Tyrrhenian Sea.

A small house sits between two huge rocks, with its back to the sea.

For decades, vendors have sold clothes once worn by American soldiers who stormed Italy in the 1940s.

One of the world's tallest flagpoles.

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

This Neolithic passage tomb forms part of a World Heritage Site.

The site of a legendary battle immortalized in medieval literature.