Washington, D.C., or simply D.C., is the capital of the United States. The signing of the Residence Act on July 16, 1790, approved the creation of a capital district located along the Potomac River on the country's East Coast. Washington D.C., is not only rich in history, it also happens to be one of the most unique and family-friendly cities to explore in the United States. From the Capital Building, to the White House, to the Lincoln Memorial, there’s no doubt that Washington D.C., is the perfect destination for an educational getaway, along with catering to a trendy crowd. D.C., offers world-class restaurants and nightlife for the younger crowd going out on the town.