This grubby wall is said to be one of the Earth's esoteric energy centers.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

Inside this Krakow church, an explosion of psychedelic color.

Real bones which are said to have belonged to a Polish dragon.

During the renovation of this bas-relief, the constructors added one unusual element.

Several 12th-century ruins can be found inside this historical market.

One of the most notable figures in the Wurstelprater’s history is often assumed to be a fictional character.

Designed as a reminder of one of the darkest moments in Austrian history.

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

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

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

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

Legends surround an ancient tree trunk riddled with nails for good luck.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Baroque celebration of the end of the Great Plague of Vienna.

This museum promotes informed contraception by documenting its often secret past.

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

This former insane asylum now holds a pathological anatomy museum.

The final resting place for the remains of 143 Habsburg royalty.

The beautiful baroque library of the Hapsburg empire.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.