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

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

A black cat protests the City Guild in Riga's Old Town.

Flamboyant architecture from the turn of 20th century.

3,000 market stands in five former Zeppelin hangars.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

An abandoned masterpiece of Soviet Brutalist architecture.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

This micro-nation may be some sort of prank, but its constitution sure seems official.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

This is not your typical jungle gym.

Less a museum than a bizarre fantasy world created by artists and engineers.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Resting place of Hollywood's immortals is also site of summer film screenings.

America's most famous piece of self-built architecture.

Elevated freight railway turned wildly successful urban park.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Medicinal spa created with the discharge from a geothermal energy plant.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.