Fun facts about this small but mighty state: Delaware shares a semi-circular border with Pennsylvania. The border was drawn at the time of the original land grants to William Penn from King Charles II and the Duke of York. Delaware is the only state without any National Park System units such as national parks, seashores, historic sites, battlefields, memorials, and monuments. Thomas Garret lost his entire fortune in his battle against slavery. He was sued by a Maryland slave owner and fined for aiding a black family in flight. Over his lifetime, Garrett reportedly helped more than 2,000 fugitive slaves move through Delaware, an important stop on the Underground Railroad.