Gladiators once walked this ancient, subterranean passage.

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

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

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

Where commuters walk through remnants of an ancient Greek necropolis.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

A sharp sculpture made of thousands of pieces of jagged glass.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

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

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Relics from as far back as the 16th century are on display in a city known for its playing card industry.

Belgium’s famous peeing statue has worn many hats (and coats, and pants), which are on display at this small museum.

A museum celebrating the Canadian forces that liberated Belgium from the Nazis replete with battlefield miniatures and multiple Gardens.

Explore 400,000 years of humans' "battle against darkness" in this offbeat but thorough lamp museum.

Dummies recreate radiological discoveries from history.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

This bike path traverses the treetops.

This bike path was sunk below water level for maximum wonder.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

Because sometimes you need to make a batch of frites even when the stores are all closed.