An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

Deep in the limestone cliffs of the Alabaster Coast, a German fortress built during World War II.

Considered "the most original, complete, and unimproved" circles in Aberdeenshire.

The first location of the eventual video game giant.

Located in a remote mountain valley in Yamagata Prefecture, these hot springs have attracted bathers for over 450 years.

The ruins of a 15th-century castle that has seen its fair share of bitter feuds.

Visitors to this museum will discover that kaleidoscopes are much more than toys.

On top of a hill, this Catholic church overlooks the most Catholic island in Greece.

This Byzantine Church was moved from Paris to Athens block by block.

One of the most photographed locations in the entire city.

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

Modernist design and funerary customs meet Spartan traditions in this one-of-a-kind graveyard.

These ancient ruins hide in plain sight next to a dessert shop.

After being destroyed by two separate fires, this monastery is now home to a small zoo and relics from dozens of saints.

After a catastrophic forest fire, a Greek artist transformed scorched tree trunks outside an old sanatorium into this haunting sculpture garden.

Underneath one of the region's most historic roads lies the home of Plato's successor.

The heads and relics of 179 monks slaughtered by pirates are on display within this Ceonobic Monastery.

This church combines Christian, Byzantine, and ancient Greek architectural elements.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

This fairytale-looking castle is a wonderful example of Greek neo-Gothic architecture

This 18th-century former mosque held the first Hellenic Parliament.