This retro, UFO-like structure is a remnant of the Soviet-era circus.

Built entirely of interlocking pieces, construction of this Chinese Muslim house of worship required zero nails.

A boulder carved into the shape of the cosmonaut's head.

This mysterious complex of abandoned yurts and fading murals was meant to be a center of science and spirituality in Kyrgyzstan.

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

Largest lake in Great Britain measured by surface area.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A colorful narrow alley in Cuba is full of street art and sculptures made of found objects.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

Huge winged monument in the United Kingdom.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

Famously misunderstood wonder of the ancient world

A popular day's outing in Bovington consists of watching military tank driving practice.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

The longest and tallest aqueduct in Britain can actually be sailed across.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A subterranean playground in an abandoned slate mine.

Hoax, mistake, or evidence of dinosaurs in human times?