An eccentric playboy's astounding natural history collection.

An unrealized dream to wirelessly electrify the entire Earth.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

This Connecticut chapel is a starkly modern, and surprisingly colorful, architectural rebel.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

The world's largest public collection of PEZ memorabilia.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

An archival collection of over 2,200 case studies which includes human brain specimens and tumor specimens.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

This graceful little figure is a one-of-a-kind version of the cherished character.

Home of Philip Johnson, one of the 20th century's most influential architects.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.