In honor of the 50th anniversary of the moon landing, the museum offers free guided tours of Robert Rauschenberg's monumental "Skyway." Originally commissioned for the 1964 World's Fair, the mixed-media piece features images from the '60s including floating astronauts and spinning planets. Tours take place at 11:30 a.m. and 1 p.m. and are limited to the first 30 guests. Check in at the Visitors Desk.