Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

The little bear in the "funny kind of hat" has made his way from London back to Peru.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

The Uros people live on floating reed islands in lake Titicaca.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

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

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

The Great Fire of London and the regulation of one-way streets both started in this alley.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

The commemorative stone column conceals a secret laboratory.

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

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Pop culture has helped to keep this iconic British building from being destroyed.

This coffee shop lies hidden beneath a historic church.

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

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

Catacombs turned marketplace.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Eighty million natural history specimens call this gargantuan museum home.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This Himalayan airport provides one of the most difficult landings in the world.