Nevada's largest cactus collection stands outside a candy mogul's small factory.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

One of the now-less-hidden floral gems of the "Emerald Necklace."

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

This popular bar has been blurring the line between normal and edgy for more than 75 years.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

A celebration of capitalism in Midtown.

An abandoned castle owned and ignored by Masons carries a cursed history.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

A reproduction of earth's many biomes.