Limestone caves in the side of a hill associated with legends and the supernatural

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

A cynical face-off exposing the cost of war.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

A piece of outsider public art accompanied by a strange urban legend.

One of Canada's tiniest museums tackles the world's largest turtle.

Greenland's first shopping mall also hosts the country's government.

Built just after the American Revolution, the oldest row house in New York City still stands in Chinatown.

Avoid gangster interaction while window-shopping.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

Hundreds of fiberglass structures line the side of the road in the middle of nowhere.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

A memorial to Chinese freedom in the city where American freedom was born.

One of the indelible moments of the American Revolution took place at this location.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

Celebrating the famous Nebuta festival of Aomori and showcasing its huge papier-mâché floats.

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.