An 18th-century hideout became a permanent and ongoing residence for one Lesotho tribe.

This odd little home was built right into an African rock face.

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

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

A 19th-century relic of timekeeping.

Did Gustav Eiffel design this enigmatic metal building?

Africa's Venice on stilts.

This subterranean town of over 50 dwellings lies thirty feet beneath the Earth's surface.

A giant chameleon, with a fascinating purpose.

The unique building practices of the Batammariba reflect the community's deep reverence for and connection to the earth.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

Where thousands of slaves passed through the "Door of No Return."

The world's largest church atop a political fault line.

Empty since 1989, now falling into ruin.

One of the most important Krio heritage sites in the country.

Built by Portuguese colonizers, the palace is now the seat of power for the independent nation.

A 19th-century architectural masterpiece with ties to Gustave Eiffel.

An architectural relic that survived the hands of time.

Founded as a refugee camp, now a popular tourist spot.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Building this tragically pointless stone barrier cost the lives of the prisoners made to build it.