A wonderful safe haven founded in the 1960s to rescue endangered monkeys from the pet trade.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

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

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

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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

This overlooked street light once served as a KGB dead letter box.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

These ornate arches show how the course of the River Thames has changed.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

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

The sophisticated hydraulic system of the Nazca civilization.

A Christian monastery stands on what was once a holy Incan temple.

This metal tower in the desert provides views of a handful of Nazca geoglyphs.

An Inca spa, military outpost or maybe… both?

One part local history, 99 parts gruesome haunted house.

This ruined 15th-century hermitage is steeped in myth and mystery.

Hear the quietest sound from across the dome.

The breadfruit-adorned final resting place of the infamous Captain of the HMS Bounty.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Elevated freight railway turned wildly successful urban park.