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

Conflicting markers on its floor tell a tale of two city centers in San Antonio.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

A dilapidated dock tells the story of Titanic's missed arrival.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A surprising museum of 20th-century technology.

World War II bunker still standing on the New Jersey beach.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A unique sculpture park that specializes in the huge and bizarre.

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

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

The beautiful, fruit-covered facade hints at this building's former life.

Despite not growing anywhere near New York City, bananas are ripened in a pressurized room in the Bronx using precise banana science.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

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