A botanically themed auditorium blooms within the world’s last operating double-decker theater.

A moving and macabre World War I-era painting by the great artist Otto Dix.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

When the rain falls, this drain system turns into a musical instrument.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

The true meaning behind this sculpture remains unknown.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

One of the deepest indoor swimming pools in the world.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

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.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Lavish royal estate punctuated with heated greenhouses.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

The Devil’s own choice when he needs a drink in Brussels.

A font of vintage porn on the silver screen.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

This massive library holds what was once the largest book collection in the world.