Pay homage to the quintessential P-town dive.

Since 1929, millions have sought miraculous healing and solace from this unknown yet deeply revered Irish priest.

A series of silhouettes that recall the great cattle drives of the 19th-century.

Once an integral part of Native American life, very few of these communal New England stones have survived to the present day.

All that remains the former site of the final home of president Franklin Pierce.

The hallowed ground of one of the worst atrocities in United States history.

This historic jailhouse was designed by famed architect Robert Mills.

A memorial dedicated to victims of the Irish Potato Famine who perished while quarantined on this island.

A dedication plaque on this Boston tunnel is a microcosm of a massive, controversy-laden construction project.

What once housed a private club catering to Comstock Lode elite is now considered one of the West’s most haunted spaces.

A new monument to an old grave that was uncovered during the rebuilding of a California ghost town.

The world's only surviving heavy cruiser has a haunting history.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

European castle ruins in an American state park are actually the product of death and grief.

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

A 16th-century horror show built in a lovely Italian garden.

An eccentric inventor's castle home with its own indoor weather system.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The Boston square dedicated to the dark poet who was born nearby.

A beautiful Victorian-era cemetery, complete with a miniature village.

The National Park Service’s best-kept secret with views that rival any in D.C.