Deep in the wilderness of the American south, a long-abandoned amusement park is home to secrets of a forgotten, imaginary world. When experts investigate, they reveal why this bizarre place was built and what caused its downfall.

Some of the world's most nightmarish places are abandoned buildings and failed engineering projects; and using cutting-edge tech, experts make new discoveries to reveal the secrets of how they were built and why they were abandoned. This two-hour episode uses segments from various past episodes with cold weather as a common trait.