Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

This deceptively salty lake looks like blushing pink lemonade.

Once living up to its name as the grandest hotel in all of Africa, the Grande Hotel is now home to a community of squatters.

Unusual building appears to be haphazardly built from randomly piled bricks.

Earth's greatest purely vertical drop at 4,101 feet.

An isolated village literally built into the crevices and rock formations of a mountain.

The world's largest rotating world.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

Ancient rock-hewn town that witnessed key events of Georgian history.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

Survival capsules find a second life as a unique hotel.

Massive kielbasa stands 42 feet tall and weighs in at 12,000 pounds.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

A mecca for India's Jains.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A fifth-century temple improbably built into the side of a cliff.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Thousands of locks professing undying devotion line the metal chains of Lotus Peak.

The celebrated eyesore created by starry-eyed sweethearts.

A son-and-daughter meat market, hawked by mom and dad.