A mental health hospital dating back more than 139 years, now features a museum.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The ruins of this antebellum sugar plantation are the end result of a Seminole attack during the Florida Wars of 1836.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

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

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.