http://www.usbg.gov/
202-225-8333
Location: Independence and First St, SW
Metro stops: Federal Center SW or Capitol South
At the foot of the Capitol, under 29,000 square feet of glass, surrounded by ornamental pools this conservatory has more than 8,000 different types of exotic fruits, flowers and plants. Admission is free. The gardens are open from 10am - 5pm daily.