This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

This old, abandoned hotel offers magnificent views.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

An elevator into the Baltic Sea.

Berlin's old airport.

Terrifying derelict military hospital once housed a recuperating Hitler.

Museum in a swimming pool where the water still flows.

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

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

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.

This small corner bar is home to a rare 1930s dance organ that still plays tunes for one Euro.

Housing the groundbreaking maps and globes of Gerard Mercator.

At this cemetery, artists are invited to design their own gravestones.

First museum dedicated to the research and history of Epilepsy.

A rare chance to ride one of the few continuous elevators still in operation.

A modern museum dedicated to the fairytales and dictionary work of the Brothers Grimm.

A varied collection of brains in alcohol.

This curious sculpture represents the perseverance needed to take to the skies.

One of the most easily accessible examples of the rare 1960s UFO houses.

An old slaughterhouse now holds the largest collection of pig artifacts.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

A small square plaque marks a failed assassination attempt that could have changed history.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’