The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The United States Capitol's former columns still stand.

America's first federal monument.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

An emporium for the weird, creepy, rare, and just plain gross.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Where the embers of the Big Bang were first detected.

The site of one of history's most indelible and horrific tragedies.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Step into the cool deep past and unknown future of who begat who.