Above the door of a house, a plaque claims to commemorate the future living place of the inventor of time travel.

This statue of a studious young woman stands at the site of Leuven's first college to accept female students.

A replica of a 17th-century map of the stars stands in the courtyard of a Belgian university.

This 19th-century zoological collection has withstood the test of time.

Where George Lemaître discovered the expanding nature of the universe.

This unassuming stone bollard is a centuries-old marker denoting the center of the city.

Though they might seem like arbitrary scratches in the wall, these were once official measures of length.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

An installation that makes understanding the size of the universe a walk in the park.

Banished from town, this local jester concocted a clever return.

Lonely minaret stump of a destroyed city.

Beatlemania is still going strong... at least in Kazakhstan.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

World's only telecommunication tower with a wooden pinnacle.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

Revitalization efforts converted a former U.S. military heliport into a sprawling urban park.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

A rare chance to ride one of the few continuous elevators still in operation.