A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

A World War II-era submarine is stuck in the mud in New Jersey.

Seven golden statues rise into the sky from sculptor Victor Victori's New Jersey front lawn.

Series of storm drains connected to a dark urban legend.

This old-fashioned candy shop, ice cream parlor, and diner served as the setting for one of TV's most controversial series finales.

World's largest collection of serial killer artwork and other macabre exhibits.

This lavish room at NYC's French Embassy is a rare relic from the end of the Gilded Age.

A simple midtown bar was once the home of a secretive and exclusive club staffed by "bunnies" under Hefner's strict rules.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

A whimsical, but often overlooked clock in Park Avenue.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

The lost town of Neversink, sunk by New York City.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

This once luxurious Catskills resort is now a haunting ruin.

This Central New York ghost town was once a prosperous railroad community.

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

Built by the patriotic residents of Boonsboro in a single day.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.