My favorite place in DC: United States Botanic Garden, Washington DC. A truly green spectacle, with a jungle, a National Garden with a First Ladies water garden, a rose garden and exhibits on ecology and evolutionary biology
Mt. Vernon Estate. George Washington's family home, located along the shores of the Potomac River, is the most scenic tourist attraction in Northern Virginia. Visit the mansion, the outbuildings, the gardens and the new museum and learn about the life of America's first president and his family.