In Chicago, a pizza-enthusiast has opened a museum dedicated to the history of pizza.

Some of the world's only freshwater seals live in one very special lake in Russia.

A unique piece of graffiti offers a little slice of local history and mystery.

Two small markers remember the Alamo's feline protectors.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This cheeky statue of a man defecating gold coins graces the facade of a medieval guildhall.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

Thanks to a spelling mistake this bizarre beaver-tiger hybrid became the symbol of a Siberian town.

Stockholm's tiniest statue is of a small boy looking at the Moon.

This iconic Russian space museum sits on a landmark space production facility and houses the Vostok 1, the first manned spacecraft, that was also built here.

Site of the largest impact event to occur over land in Earth's recorded history.

This exacting restaurant will charge a fine for every grain of rice you've left behind.

A tribute to Richard Feynman is carved into the land he planned to see but never got to visit.

Russia's giant concrete QWERTY keyboard is likely the largest in the world.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

Crawling into this primordial cave may feel disconcertingly familiar.

This Soviet-era "closed town" was a top secret uranium producer often left off of maps.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

One of the largest collections of socialist realist art shows the surprising depth of the official art of the Soviet Union.

The world's first museum dedicated to the work of game-changing naturalist Charles Darwin.

Moscow's imposing monument to the Space Age.