The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

An enormous, inside-out glass globe built in 1935.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

A historic bridge with a lovely acoustic anomaly.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

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

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

A coastal rock outcrop with mysterious inscriptions variously attributed to Native Americans, Portuguese, Phoenicians, Norse, and more.