In 2008, this Mexico City metro station was the site of an hours-long fight between emo, punk, and goth groups.

A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

This stately clock was gifted from China's last imperial government to the people of Mexico.

After several moves across Mexico City, these two statues found a home in Mestizaje Park.

Preserved behind glass, the ruins of a medieval building used to store human remains.

The outside of this theater is decorated with a Diego Rivera mural that explores the history of Mexico.

One of the oldest hospitals in the Americas is now decorated in hallucinatory murals.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

These plaques located in a court preserve a small piece of Edinburgh's history.

This statue stands as a message against the ills of Apartheid.

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.

A preserved section of the Atlantic Forest is an important habitat for these critically endangered monkeys.

A wall of this old hotel was decorated with drawings made of pebbles during its construction.

Today, Kent's medieval monarchs hold court on a busy pedestrian thoroughfare—or at least their statues do.

Two beautiful Victorian-era parks replete with ornamental waterfalls and lakes.

The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

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 building that once housed the dictator's secret police is now a museum that documents the history of an oppressive regime and those who fought against it.

A woodland close to England's "most haunted village" has been the site of many unexplained events and deaths.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

The archeological ruins of the ancient fortified city of the mysterious Teotenanca civilization.

This underpass became an unlikely piece of cinematic history after its appearance in 'A Clockwork Orange.'

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.