The smallest covered bridge in Maryland.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

The longest covered bridge in Delaware.

An abandoned gun-funded 19th century utopia.

Now home to hardy plants, these sand and gravel dunes once held back a massive prehistoric lake.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

At this farm in upstate New York, the former president plotted his reelection campaign.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Anna Anderson spent most of her life claiming to be the lost Romanov child Anastasia.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Golden plates containing what would become the Book of Mormon were believed to be buried on this New York hillside.

This statue commemorates the meeting of the most influential minds of the women’s rights movement.

The final resting place of Harriet Tubman and other famous historical figures.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

What remains of the simple red brick chapel where the women's rights movement began.

Happen to come across a dead eagle? Send it to America's official dead eagle warehouse.

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.

Roaming bison and a spectacular view at the highest point in Nebraska.