This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.