1. Metropolitan Museum of Art1000 Fifth Ave., at 82nd St.; 212-879-5500Take advantage of the museum’s special Holiday Monday, 9:30 to 5:30, to check out the Rauschenberg “Combines.”2. Solomon R. Guggenheim Museum 1071 Fifth Ave., at 88th St.; 212-423-3500 See why critics have been raving about the David Smith retrospective (the museum keeps its regular hours).3. Museum of Modern Art11 W. 53rd St., nr. Fifth Ave.; 212-708-9400“Edvard Munch: The Modern Life of the Soul” opens on Sunday; the museum holds regular Monday hours.