A collection of vintage liaison aircraft kept in flying condition and on display at an airfield in San Antonio.

Tile mosaics and quotes from Pablo Picasso add an artistic flair to these bus stop benches.

The wood bears a hidden love note carved by a young Johnny Cash.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

Ruins of a once-opulent grand Victorian resort.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.

Some people believe that this makeshift space monitoring station received transmissions from clandestine cosmonauts.

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

All that remains of a Japanese fishing vessel that ran aground in 1982.

The haunting beauty of this little-visited wreck makes it a true hidden treasure.

A giant concrete Brutalist water tower in suburban Johannesburg.

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

The tallest residential building in Africa is an unsettling Brutalist monolith.

This historic observatory was established to keep shipwrecks from littering the Cape of Good Hope.

Over a million items cram the shelves at Africa's largest shop of used and rare books.

Hidden in the hills is a mysterious stone structure, known only to a few.

An abandoned water park overtaken by the dunes.

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

This hulking behemoth is actually five interconnected towers built in the 1960s.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Dozens of padlock-trees along the Moscow River.

Moscow's imposing monument to the Space Age.