A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

Records of the dead describe the myriad odd ways people used to die.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.

This combination shop and museum is filled with curious items and artifacts.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

Three generations of intrepid collectors display their curious artifacts in a homemade museum right next to the caves they discovered.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

This historic Idaho island is home to a strange timeshare museum, a homemade mini-golf course, and an outhouse named Aunt Fanny.

This set of hot springs also comes with fantastic views.

This landmark is a central figure in the Nez Perce origin story.

Rare and gorgeous birds abound in this protected wildlife sanctuary.

This oddity shop contains everything from antique tools to a human skeleton.