A hidden "place of interment for gentlemen."

An unassuming secret door once led to a legendary watering hole.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

Plagued by riots, celebrity injuries and a tragic death, this amusement park has been demolished.

Oldest unrestored plantation house in America that is open to the public.

World War II bunker still standing on the New Jersey beach.

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

This derelict building used to house infirm Freemasons, their widows, and orphans.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Part bookstore, part café, and part forest.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

This church, buried halfway in lava rock, is all that remains of a Mexican village destroyed by a volcano.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

Surreal riveted sea forts once protected the Kent shores from German attack.

Regency-era excess on the English Coast.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The Vatican of the movie industry turned into an actual church.

The home of aviation trailblazers, in a remote corner of the big city.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Waterway populated with abandoned projects, including a submarine.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.