A garden of flying flowers.

You would never come across this tiny green oasis if you didn't know it existed.

Ancient man-made caves underneath small town Belgium.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

Rediscovered in 1992, this abandoned medieval village once flourished by fishing and piracy.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

Stocking up on the world's best beer requires a pilgrimage to a monastery drive-through.

Abandoned since 1998, this train station has become an oasis for urban explorers.

This old, abandoned hotel offers magnificent views.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

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.

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

Dummies recreate radiological discoveries from history.

Only museum in the world devoted to bookbinding and book arts holds a permanent collection representing five centuries.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

Housing the groundbreaking maps and globes of Gerard Mercator.

An open-air sewer system that was covered piece-by-piece over 300 years.

Descend into the tunnels to experience the life of a coal miner.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

When you're a great Russian Tsar, even your vomit gets a statue.

A fantastical bed and breakfast with magically unique rooms.

A Museum of Psychiatry in a still-operating mental institution.