Six rock shelters covered in abstract art created by ancient Ugandan tribes.

In Zanzibar, a historic 19th-century palace is a reminder of the world's shortest war.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

The former headquarters of history's oldest megacorporation.

A fascinating and enormous collection of natural history exhibits stained by a dark colonial legacy.

A French library that makes sure its love of books is writ large... giant in fact.

A haunting collection of the vanished and disappearing natural world.

This massive library holds what was once the largest book collection in the world.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A kaleidoscopic warehouse-maze of handmade neon signs.