A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

Apartment complexes built into huge repurposed natural gas tanks.

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

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

A book bound in the skin of an infamous criminal, along with countless other specimens.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

Fast food feels like fine dining at this award-winning modern Georgian building.

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

An ancient knight and a symbol of the city's freedom.

This 15th-century church houses priceless works of art from a range of Croatian artists.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.