An unusual sculpture with a meaning shrouded in mystery.

Week-long block party becomes a competition for the best decorated street.

The unexpectedly beloved remnants of a controversial thermal power plant.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

A beautiful but toxic fountain of mercury.

More than a millennium's worth of municipal records preserve the political history of Austria.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

A silly medieval mural preserved on the side of a Viennese house.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

A spherical "micro-nation" in the heart of Vienna.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

This cubist Vienna church building looks like some sort of alien stonehenge.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

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

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

An industrial relic is now one of Europe's most staggering art spaces.

In this truly magical place, rent hasn't been raised since the year 1520.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

Terrifying derelict military hospital once housed a recuperating Hitler.