Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.

Mined to a depth of 240 meters with a perimeter of about 1.6 km, the largest hand-dug excavation in the world.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

Local lore says a serpent-like beast lurks in the deep basin below the falls.

These otherworldly caverns form Earth's oldest known cave system.

Largest cave system in Africa.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

A mysterious shape catches the eye in this 16th-century painting.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

This luxury shopping lane has been protected by its own tiny police force for over a century.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Hear the quietest sound from across the dome.

An unusual round church in London with a Templar past.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

The world's first and only escalator for lazy bicycles and their daunted riders.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.