Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.

A tiny island home to a former English slave fort.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A naturally mummified 2,000-year-old man.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Giant, friendly pelicans in Central London, the most unlikely of places.

Elaborate tile work in this railway station tells the story of Portugal.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

World's most expensive home.

Sacred Indian temple that’s all monkey business.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

Indents in the pavement are all that remain from a grisly death machine in Paris.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

More gold than anywhere else, ever.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Museum preserving torture methods from the past.