An unusual manor of stunning beauty, born out of a crippling disease.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

These caves secretly held national treasures during World War II.

An ancient octagonal weather station named for the eight Greek gods of wind.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

What once sat in the world’s spotlight is today a largely disused ghost complex.

A sharp sculpture made of thousands of pieces of jagged glass.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Pick up a kebab and a credenza at this unique combination furniture store and café.

This Ottoman-era church is hidden amid a busy tourist area.

A statue commemorating a 16-year old girl's nighttime ride to raise a militia against attacking British troops.

One of the oldest amusement rides in existence was a huge disappointment to its creator.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

Stockholm's narrowest alley is barely over two feet wide.

Stockholm's tiniest statue is of a small boy looking at the Moon.

Sweden's "good old days" painstakingly re-created in a model village.

Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.