The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Blitzkrieg bop your way through Berlin's Ramones Museum.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

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

This ancient market is often referred to as the oldest shopping mall in the world.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

This work of engineering is imbued with elegance and ingeniousness.

This church is named for one of the most dramatic tales in the early Christian church.

Ancient mysterious ruts carved in the bedrock.

The Isle of Wight’s “Island Line” serviced by former London Underground trains from the 1930s.

A modern museum built within a Victorian dry dock charts the history of the industrial town.

Before becoming a poet John Keats studied here to become a surgeon.

19th century tunnels burrowed under Liverpool.

These rose marble urinals are the most luxurious loos in Liverpool.

The historic villages and towns of Suffolk are filled with wonky wooden beam houses painted an unusual shade of pink. Unknown to many though, this sweet shade has a bloody history.

Inside this station, the 1945 film "Brief Encounter" is played on a loop daily.

A small alleyway with an unusual moniker.

One of the oldest remaining Catholic churches in England is home to the hand of a 7th-century saint.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

This eye-catching roundabout sculpture commemorates one of England's best World War II-era "shadow factories."