One of New Jersey's oldest churches is a historical treasure trove.

This ruined castle is said to be the legendary keep of a Viking princess.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

One of the oldest, tallest, and most haunted lighthouses in America.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

This haunting monument honors the victims of 9/11.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

Browse through a century of this principality's first popular export.

A wooden theatre that remains the heart of a charming Victorian-era New Jersey enclave.

Out of a desire to feed hungry soldiers, a franchise-altering idea was born.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

A cemetery that holds graves for the forgotten children of a burned orphanage.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

Four hundred years ago, this turned-about message was carved into one of Winchester Cathedral's exterior walls.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.