National Gallery of Art
Location: National Mall between 3rd and 7th Sts, NW
Metro stops: Smithsonian or Archives- Orange and Blue Line
The National Gallery of Art is one of the world's largest marble structures, measuring 780 feet in length and containing more than 500,000 square feet. Open year round Monday through Saturday 10:00 am to 5:00 pm and Sundays from 11:00 am to 6:00 pm every day except Christmas and New Year's Day.