Ruins of a historic medical facility sits eerily by the water.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

This former asylum for Black Americans is haunted by its history of violence and racism.

Cannon designed to fire an atomic warhead.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

See wolves, coyotes, and arctic foxes in a natural environment smack in the middle of New York State.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

A remote horde of architectural treasures fit for Indiana Jones.

A Gothic-style abode built to accommodate the church's three resident peacocks.

The contents of this safe survived a 37-kiloton nuclear bomb.

The artwork that Italians felt California didn't deserve.

A piece of John the Baptist in the American heartland.

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

A park and memorial dedicated to the victims of the deadliest school massacre in American history.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

One of the oldest Jewish cemeteries in the city, it is now overgrown with an urban forest.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

A long-vacant Scottish Rite temple in Hollywood has been converted into an art museum filled with Masonic relics.