The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

A tribute to those that perished during the American Revolution.

A decaying concrete oil tanker served as a disposal location for bootleg hootch.

Industrial ruin decimated this tiny New England company town in a fashion no one saw coming… and even fewer remember today.

A monument to the “unrecognized dead” of the tragic 1876 train crash.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

Oldest surviving example of a Dutch saltbox frame house in America.

Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

An abandoned stretch of highway, deteriorating next to the operational one.

This forgotten graveyard in rural New York State once served a pioneering hospital.

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

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Steam engines and conveyor belts are remnants of a genius system left in the middle of the Maine woods.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

Where you can experience the story of Appalachia, as told by Appalachians.

A historic blockhouse and trading post give a glimpse into the early colonial history of South Carolina.

An unfinished rail tunnel that has since been used to house cheese and bats.

A replica of a fort built from a frontier town's mass hysteria in the face of false reports of impending Native American violence.

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

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

A mysterious air force base built to resemble a Long Island fishing village.

An abandoned 146-acre summer resort slowly being reclaimed by nature.