O’KEEFFE, STETTHEIMER, TORR, ZORACH: WOMEN MODERNISTS IN NEW YORK Organized by the Norton Museum of Art in Florida, this show examines the parallel careers of Georgia O’Keeffe, Marguerite Thompson Zorach, Florine Stettheimer, and Helen Torr in New York. Through Sept. 18. Portland Museum of Art, 7 Congress Square, Portland, Maine. 207-775-6148, www.portlandmuseum.org

EXPLODE EVERY DAY: AN INQUIRY INTO THE PHENOMENA OF WONDER More than 20 contemporary artists from the United States, as well as Canada and France, feature in an ambitious show designed to explore — and activate! — the condition of wonder. (Pictured: Fred Tomaselli’s “Box for Your Head.’’) Through April 3, 2017. Massachusetts Museum of Contemporary Art, Mass MoCA Way, North Adams. 413-662-2111, www.massmoca.org

SPLENDOR, MYTH, AND VISION: NUDES FROM THE PRADO Twenty-eight Old Master paintings, all representing the nude, on loan from Spain’s great museum. Includes work by Titian, Tintoretto, Rubens, Velazquez, Ribera, and Poussin. All but four have never previously been seen in the United States. The Clark is the show’s only venue. Through Oct. 10. Clark Art Institute, 225 South St., Williamstown. 413-458-2303. www.clarkart.edu

GRANDMA MOSES: AMERICAN MODERN More than 60 paintings and works on paper by the legendary self-taught artist, presented here in a context of developments in modernism, alongside work by other 19th- and 20th-century folk and modern artists. Through Oct. 30. Shelburne Museum, 6000 Shelburne Road, Shelburne, Vt. 802-985-3346, www.shelburnemuseum.org

SEBASTIAN SMEE