COLBY COLLEGE MUSEUM OF ART Marking this acclaimed museum’s bicentenary, Colby College has opened a new, 26,000-square-foot addition, the Alfond-Lunder Family Pavilion, and a raft of exciting new shows, including works from the Lunder Collection, more than 500 pieces recently donated to Colby. (Pictured: John Chamberlain’s “Rare Meat.’’) Through June 8. Colby College Museum of Art, Waterville, Maine. 207-859-5600, www.colby.edu/academics_cs/museum
MAURICE PRENDERGAST: BY THE SEA A retrospective of the great early American modernist’s work, focusing on his depictions of leisure activities by the sea. Through Oct. 13. Bowdoin College Museum of Art, Brunswick, Maine.
BARRY MCGEE A mid-career survey of the popular San Francisco-based artist who has made a dynamic shift from street art into galleries and museums. Through Sept. 2. Institute of Contemporary Art. 617-478-3100, www.icaboston.org
LIFE’S WORK: TOM PHILLIPS AND JOHNNY CARRERA Phillips’s conversion of a 19th-century novel into a work of art, more than half a century in the making, is the highlight of this show that also features the brilliant US artist Carrera. Through Jan. 20. Massachusetts Museum of Contemporary Art, North Adams. 413-662-2111, www.massmoca.org