A whimsical bridge adorned with decorative dragons.

A gorgeous stone viaduct crosses over a bucolic valley.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

Thousands of well-dressed mummies below a monastery.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

A single column facing the sea is all that's left of one of the most important temples of Magna Graecia.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

An abandoned quarry hides an open-air gallery of huge sculptures, some made from the rubble of 9/11.

An abandoned monastery sits on a far-off island in the Adriatic Sea.

A galley-shaped memorial to the prisoners of an infamous fortress.

In this museum, visitors are invited to touch the art.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.