America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

Yo, Adrian!

The last bastion of Roman presence north of the Alps looms over a German town.

World's largest barrel containing an inn.

A former ironworks that was the first UNESCO industrial site.

A Faraday Cage protects cars from a nearby high-power transmitter.

A hidden alley in urban Baltimore is a haven for graffiti artists.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

This jail which was in service for over a century is now open for curious visitors.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The modern birthplace of Irish freedom.

A particularly disconcerting tribute to Irish martyrs.

Experience what life was like in Ireland during the Viking and medieval ages.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A Gothic-style abode built to accommodate the church's three resident peacocks.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

Hiroshima survivor on Riverside Drive.

The "Seinfeld" diner.

Visit the monolithic tomb of America's most famous general.

This was one of the first (and last) university-built and operated nuclear reactors.

There’s a hidden military meme engraved on the World War II Memorial.