What looks like a suicide in progress is actually a statue of Sigmund Freud.

A Jenga-style cylindrical tower of books that appears to go on forever.

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.

The "Prussian Versailles" that is as glorious today as when it was built.

Cold war icon and onetime "hole" in the iron curtain.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Legend has it that not even Stalin could pull down the 2015 European Tree of the Year.

The Guardian of Tallinn.

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Mysterious craters may have been home to an ancient cult.

Berlin's old airport.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.