This nine-story building is the oldest standing skyscraper in D.C.

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

This tree was extinct for a thousand years before sprouting again from a 2,000-year-old seed.

Military and first responders can test their skills in a Foggy Bottom mock station down in Georgia.

Supposedly Satanic numbers adorn this preserved submarine sail.

This small museum is an eccentric shrine to boyhood in the 1960s.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

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

A once grand hotel is being retaken by the wilderness it once capitalized on.

A peaceful international sculpture garden in upstate New York.

One man's swirling six-acre monument of stone.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

A living antique aviation museum in the historic town of Red Hook, New York.

A distillery built on (and above!) mobster Dutch Schultz's Prohibition-era underground moonshine business.

The site of the first "historically true" UFO encounter in the U.S.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Retirement home where the actress who played the Wicked Witch of the West passed away.

A former copper mine which became a truly unsuccessful prison.

This lovely hilltop tower was specifically built to withstand 100 MPH winds.