A prized globe signed by Amelia Earhart and Charles Lindbergh sits in the Brooklyn office of the American Geographical Society.

The preserved house of a jazz legend still echoes with his music.

This picturesque Victorian ghost town was once a thriving mill community.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

An abandoned Depression-era zoo hidden just off the highway.

This factory made "health corsets" that were a step towards liberating women's bodies.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Also known as the Founding Church of Scientology.

The early data processor factory founded in Washington for the 1890 U.S. Census went on to become IBM.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

Cold War intelligence agents monitored communist embassies from an attic in a former pigeon coop.

An Industrial Revolution-era public work that purified water using nothing but sand.

There's a crumbling old mansion inside the Smithsonian National Zoo.

The house where John Wilkes Booth conspired with his co-conspirators.

The national park was once a plantation estate.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.