This Latvian shot factory is still used twice a year to manufacture bullets the old-fashioned way.

Two old windmills got a new life as oversized sculptures of a man and a woman.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

Vines grow up the metal bars in this public park created from an old machine factory.

How this choice of tombstone came to be is still a mystery.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

An unmarked, overgrown path through dense vegetation leads to the largest ancient structure in Polynesia.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Open-air museum with a large collection of Soviet-era statues.

A curious art park at the geographic center of Europe is home to 3,000 television sets and other wonders.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

Along the Rhine, about a mile from the historic Munster, learn the heartrending story of two lovers torn asunder, cast into unknown layers of time and space.

Video games, body language, and postal history are all on display in this Swiss museum.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This simple apartment may have inspired some of the most important theories in the history of science.

The bears of Bern have been a city highlight for over 500 years.

One of the world's largest collections of pharmaceutical artifacts.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This taxidermilogical collection was assembled by a peltmonger turned animal activist.

A mythically themed self-built sculpture park.