This beautiful 19th-century temple stands atop the ruins of its predecessor.

The telescope that discovered Neptune.

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

A serious museum dedicated to two German comedians.

A fearsome dragon clings to a corner of Munich's city hall.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

A stairway to heaven, or to nowhere at all.

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

Fantastic views and thousands of love locks.

After years of being casually peed on by humans, this tree is peeing back.

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

The house that took a plunge into the facade of a museum.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Museum devoted to the artificial language of Esperanto.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

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

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

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A series of playful yellow penguins share a serious message about the environment.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

A bus with a butt and biceps to put Olympic athletes to shame.

Monument to a suicide protesting the Soviet invasion.