One of the oldest wine cellars in Germany is now a restaurant beneath Bremen's town hall.

Climb inside an iron crystal magnified 165 billion times its normal size.

Theme park featuring miniature replicas of European monuments.

Lavish royal estate punctuated with heated greenhouses.

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

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This museum is housed in an unassuming building that witnessed one of the most daring feats of satire in modern history.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

This modern arts center is built around a gem of late-Baroque architecture.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

There are two dozen tanks just sitting in an open field in Lower Saxony.

A tilted half-timbered house from 1672 is built into a salvaged segment of a medieval wall.

WWII rocket launchpad in rural Germany and site of operation backfire.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

This cheeky statue of a man defecating gold coins graces the facade of a medieval guildhall.

Giant wind turbine with observation deck at the very top.

The nerve center of a massive, state-of-the art radio telescope that sprawls across Western Europe.

Remarkably preserved body discovered in a peat bog.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

This dockworkers' lunch joint has been left leaning by a century of storm floods.

Executed in 1401, Exhumed in 1878, Stolen in 2010.

Model Trains and Much More in Hamburg.