A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

The radical suffragist left striking words on her tombstone.

The largest guitar store in the world has been visited by some of music's all-time greats passing through upstate New York.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

A guitar mounted on a wall in Temple Bar honors the Irish musician.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

The oldest public library in Ireland.

This tiny home was originally a narrow alleyway.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

An architectural oddity hides in plain sight on this iconic London bridge.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A memorial for public executions that dates back to the 14th century.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The broken skateboards that became a poignant memorial to a murdered skater.

This ancient Egyptian obelisk still bears the wounds of World War I.

London's smallest police station is barely the size of a phone booth.

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

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."