Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

Built by the patriotic residents of Boonsboro in a single day.

A priceless collection of the Nation's cryptologic history.

An astounding collection of medical specimens, including bits of President Lincoln.

The nation's second-ever First Lady urged the founding fathers to "remember the ladies."

The homestead of American patriot John Adams.

Narrowest house in Boston.

A unique home built by Andrew Jackson Caldwell that also served as a military hospital.

Amazing taxidermy dioramas from the 1960s in a cement building meant to look like an ice cave.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

The world's longest known cave system.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

The state's oldest continuously operating museum houses more than 5,000 Civil War artifacts.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

Colorado's only true geyser is hidden within the San Juan National Forest.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.