The highest point in Florida is still the lowest high point in the country.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

The highest point in Connecticut was incorrectly memorialized before surveyors discovered the actual spot.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

A large stone map of Arkansas awaits visitors to its highest point.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

The king of U.S. high points towers over every other peak on the continent.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

The summit Roosevelt conquered before he descended to become The Chief.

The longest living non-clonal organisms on Earth.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

Protecting the future of some of the rarest and most misunderstood mammals of North America.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A fitting attraction for the corn capital of the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

Walk the whole Mississippi River!

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

A collection of huge Pre-Colombian structures in Alabama.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.