A treehouse assailed by the elements and the government, now gone.

A memorial to a larger-than-life legend, inside a county that also holds Bunyan's death certificate.

A futuristic climate change study is nestled deep within this public land.

No one's quite sure where this quirky university tradition originated.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

Ever wanted to can Spam?

The famed architect designed this Minnesota gas station of the future with a lookout tower.

It was once the base for a series of domestic terror attacks.

This statue of the "father of television" stands prominently in the United States Capitol.

The 28,000-year-old specimen is remarkably intact.

Amid the sprawling Defense Intelligence Agency Headquarters is one of Washington's least accessible museums.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

A wondrous old library overlooking the nation's capital.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

The eccentric mansion of one the most popular horror authors of modern times.

This smiling statue memorializes local cartoonist Bob Montana and his legendary creation.

A town wears its heart on the sleeve of a smiling girl, arms flung wide open in a cheerful greeting for all who encounter her.

Former abode of notable poet, complete with literary references and stories of ghosts.