The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

Museum dedicated to "the man who moved the Earth."

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

This Communist-era residential block is one of the longest residential building in Europe.

The site of the first battle of World War II.

This antique thermometer honors the creator of the first universal temperature scale.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

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

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

Boats must transform into railroad cars to navigate this Polish canal.

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

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

This striking structure is the Socialist-modernist centerpiece of a former Soviet spa resort.

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

The pyramid and dome deep inside the Dzūkija forest are believed to channel divine energy.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

A Neolithic celestial calendar standing in a nondescript wheat field.

Is this statue at Naumberg Cathedral the fairest of them all?

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

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

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Monasteries on rock pillars, once accessible only by frayed ropes.

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