The restored and active Victorian-era final resting place of San Francisco.

A recently abandoned psych ward at the end of Sanatorium Road.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

100-year-old shipwreck you can walk up to at low tide.

A rare view of a preserved Victorian science museum.

Buried beneath an unassuming Gotland farm was the largest collection of Viking silver, mostly of Islamic origin.

Oldest unrestored plantation house in America that is open to the public.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

Ruins of a Carnegie family mansion on Cumberland Island.

In 1787, a group of delegates met at this very spot to drink, be merry, and ratify the Constitution of the United States.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

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

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Final resting place of a 19th century gold prospector and convicted cannibal.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This tribute to the founding father of the American dictionary originally contained a spelling error.