Presidential residence from the time of John Adams. Photo ops from north and south gates. Self-guided public tour requests must be submitted through a member of Congress at least 21 days ahead. Tours Tues.-Thurs. 7:30 a.m.-11:30 a.m., Fri.-Sat. 7:30 a.m.-1:30 p.m. The visitor center at 1450 Pennsylvania Ave. NW offers free videos and interactive exhibits about the residence and its occupants. Daily 7:30 a.m.-4 p.m.