O’KEEFFE, STETTHEIMER, TORR, ZORACH: WOMEN MODERNISTS IN NEW YORK This show examines the parallel careers of Georgia O’Keeffe, Marguerite Thompson Zorach, Florine Stettheimer, and Helen Torr in New York in the early 20th century. Through Sept. 18. Portland Museum of Art, 7 Congress Square, Portland, Maine. 207-775-6148, www.portland museum.org

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. (Pictured: “Bennington.’’) Through Oct. 30. Shelburne Museum, 6000 Shelburne Road, Shelburne, Vt. 802-985-3346, www.shelburne museum.org

LANDSCAPES AFTER RUSKIN: REDEFINING THE SUBLIME This chewy and surprising group show, selected by acclaimed photographer Joel Sternfeld, at the Hall Art Foundation features works by Gerhard Richter, Anselm Kiefer, Neil Jenney, Ai Weiwei, Bruce Nauman, Raymond Pettibon, Eric Fischl, Spencer Finch, Thomas Ruff, Richard Long, and many less well-known artists. Through Nov. 27, open weekends (and Wednesdays by appointment). Hall Art Foundation, 551 Route 106, Reading, Vt. 802-952-1056, www.hallart foundation.org

EXPLODE EVERY DAY: AN INQUIRY INTO THE PHENOMENA OF WONDERMore 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. Massachusetts Museum of Contemporary Art, 1040 Mass MoCA Way, North Adams. 413-662-2111, www.mass moca.org SEBASTIAN SMEE