These crumbling Latvian forts make for some haunting seaside ruins.

Kuwait City's uniquely designed water towers look straight out of a retro sci-fi cityscape.

The defensive tower was built centuries ago to warn locals of Berber pirate attacks.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

Single runway interrupted by a busy road that cuts across its middle.

The largest and best-preserved rotunda in Prague.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A Baroque mansion with ties to legendary magicians and alchemists.

A former squatter's paradise outside Prague.

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

The oldest garden in Prague, once part of an medieval orchard.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

Looming communist pillar with a Czech twist.

This spooky statue sits outside a famous Prague theater.

An Orwellian sculpture with eyeball cameras watches passersby.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Macabre astrological automaton clock dating to the late 1400s.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

A "miracle" that seems to produce more holy fistfights than holy revelations.

This historic black and white monastery is one of Bulgaria's architectural jewels.