Two gems of Beaux Arts architecture that have been sitting vacant for years.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

This California artist's front yard acts as a gallery for his unique, scrap metal animal sculptures.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

Once America's longest-manned military fort, now an abandoned hulk.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

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

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

I fought the law and the precinct caved in.

A crumbling hospital from the 1850s on Roosevelt Island.

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.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

One of only two remaining Victorian-era greenhouses in New York.

This mouldering abandoned mental hospital was once a center for progressive healing.

This forlorn park is the result of a failed investment turned tax dodge.

This abandoned ironworks was once the most important military supplier in America.

The final resting place of some of Staten Island's earliest settlers and their descendants.

A beautiful, historic location open to the public.

The historic home still shows the scars from a little run-in with the British in 1813.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

Now a city park, this site started as a stage stop, then was a working ranch, and finally became a dude ranch that specialized in letting wannabe divorcees establish Nevada residency.