A labyrinthine museum chronicling the history of African culture in Brazil.

This singular art museum in São Paulo is unique inside and out.

An enigmatic mural hiding in plain sight in one of São Paulo's busiest metro stations.

Striking ruins of a mansion that stood center stage in one of modern Brazil's most puzzling crimes.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

A snake farm famous for its venemous varieties.

The crypts are so large they're basically their own underground church.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A unique tribute to the millions of animals who served and died for the British military.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Catacombs turned marketplace.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.