These caves secretly held national treasures during World War II.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.

A Buddhist temple to honor insects that died for science.

Shrine to Japanese water-goblins, complete with their preserved body parts.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

Not quite the menace it once was, this monster still has some chops.

The original "capsule building" is a masterpiece of Metabolist architecture.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

Sniff the Titan Arum's rotting flesh.

Single runway interrupted by a busy road that cuts across its middle.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

A Byzantine-era church hidden in a wooded area below the Acropolis.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.