This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A stunning garden filled with fantastical environmental folk art and sculptures.

One of the largest Native American shell middens stands 30 feet tall.

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

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

This once-private estate is now a dreamy, meditative garden that's open to the public.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

This mouldering abandoned mental hospital was once a center for progressive healing.

This one-man homegrown eatery may be the world's most exclusive restaurant with its five-year waiting list.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

A quiet and contemplative oasis in the middle of New York's bustle and riot.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

A peaceful international sculpture garden in upstate New York.

A community of collapsing homes more than a mile out from the Florida coast.

This beautiful Miami garden was designed as a laboratory for tropical plants.

Over 120,000 curious objects that have shaped our modern world.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

An abandoned water sports stadium that has become a haven for graffiti and decay.

The curiosities and wonders of pharmacy in a delightful historic building.

This secluded Iceland farm holds the collected works of one rural sculptor's creations.