GEOFFREY FARMER Farmer, who has been selected to represent Canada at the 2017 Venice Biennale, presents a room-size installation of hundreds of his small-scale, puppet-like sculptures made of photographic cut-outs and fabric, as well as a projection of random photographs from a clippings library and more. Through July 17. Institute of Contemporary Art. 617-478-3100, www.icaboston.org

MEGACITIES ASIA Sculptures, installations, and other large-scale work grounded in an aesthetic of accumulation, by artists based in Asian cities of 10 million people or more (Mumbai, Beijing, Shanghai, Delhi, Seoul). Includes installations and sculptures by Ai Weiwei, Song Dong, Hema Upadhyay, Subodh Gupta, Asim Waqif, Yin Xiuzhen, Hu Xiangcheng, the collective flyingCity, and Aaditi Joshi. Through July 17. Museum of Fine Arts. 617-267-9300, www.mfa.org

N.C. WYETH’S MEN OF CONCORD. The 12 panels N.C. Wyeth painted for the book “Men of Concord and Some Others, as Portrayed in the Journal of Henry David Thoreau’’ (1936) have been reunited for the first time in almost 80 years. They will be accompanied by drawings, sketches, and studies. (Pictured: Wyeth’s “Walden Pond Revisited.’’) Through Sept. 18. Concord Museum, Concord. 978-369-9763, www.concordmuseum.org

EVERYWHEN: THE ETERNAL PRESENT IN INDIGENOUS ART FROM AUSTRALIA An overview of indigenous art from Australia, most of it made over the last 40 years. Through Sept. 18. Harvard Art Museums. 617-495-9400, www.harvardartmuseums.org SEBASTIAN SMEE

Sebastian Smee can be reached at ssmee@globe.com.