A historic observatory precariously perched at the "Top of Europe."

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

A formerly abandoned mental institute, now back in business.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

The loneliest island in New York.

Eclectic collection of dark and macabre antiques.

A dead saint, a deadly poison, and a mysterious holy ooze.

The sign at the garden gate reads: "These Plants Can Kill."

The largest island on the great salt lake is home to curious creatures and strange stories.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

A natural gas leak provides a flickering flame beneath a waterfall.

Earth's greatest purely vertical drop at 4,101 feet.