Astonishing collection of helmets, scientific instruments, and medical models.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

Whale bones, scrimshaw, and sperm oil make up just a part of this comprehensive collection of whaling history.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

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

A formerly abandoned mental institute, now back in business.

The site of a tragic massacre that spawned a multimedia franchise.

A historic lighthouse steeped in rumors of ghost and pirate stories.