Holiday Train Show Exhibit - Connecticut River Museum, 67 Main St., Essex; annual family-friendly display by Steve Cryan; through Feb. 17; 10 a.m.-5 p.m. Tue.-Sun.; (860) 767-8269.

Lost at Sea: Shipwrecks of the Ancient World - Lyman Allyn Art Museum, 625 Williams St., New London; exhibit explores cultural treasures of the deep sea and artifacts discovered by Robert Ballard and his team; through Feb. 1; "Catch the Butterflies" installation, created by local artist Brian Keith Stephens, in the Glassenberg Gallery through Jan. 3; 10 a.m.-5 p.m. Tues.-Sat., 1-5 p.m. Sun.; (860) 443-2545.

Life Stories in Art - Florence Griswold Museum, 96 Lyme St., Old Lyme; the Krieble Gallery features more than 70 works by 19th-century painter Mary Rogers Williams; also, 20th-century sculptor Mary Knollenberg; and contemporary glass artist Kari Russell-Pool; through Jan. 25; 10 a.m.-5 p.m. Tues.-Sat. and 1-5 p.m. Sun.; (860) 434-5542.

Washed Ashore - Mystic Aquarium, 55 Coogan Blvd., Mystic; sculptures exclusively from marine debris and plastic pollution; through early spring; 9 a.m.-4 p.m. daily; (860) 572-5955.

Proof Positive - Slater Memorial Museum, Norwich Free Academy, 108 Crescent St., Norwich; works by members of the Printmakers' Network of Southern New England; through Jan. 18; 9 a.m.-4 p.m. Tues.-Sat. and 1-4 p.m. Sun.; slatermuseum.org.

GALLERIES

December: Celebrate the Joy! - Artists' Cooperative Gallery, 7 Canal St., Westerly; works by member artists available for purchase as holiday gifts; through Jan. 4; 11 a.m.-7 p.m. Wed.-Sat., 1-5 p.m. Sun.; (401) 596-2221.

Art for Architects's Sake - Centerbrook Architects, 67 Main St., Centerbrook; 50 works by 14 staff members are featured; 10 a.m.-5 p.m. weekdays; (860) 767-0175.

All Paintings Great and Small - Cooley Gallery, 25 Lyme St., Old Lyme; annual holiday exhibition; through Jan. 10; 10 a.m.-5 p.m. Tues.-Sat.; (860) 434-8807.

Heart and Home - Courtyard Gallery, 12 Water St., Mystic; holiday show, featuring work from over 40 painters and sculptors; 11 a.m.-5:30 p.m. daily, closed Wed; (860) 536-5059.

Juan Balaguer: Familiar Images - Expressiones Cultural Center, 84 Bank St., New London; Argentinian artist-in-residence presents new show through Sat.; 11 a.m.-5 p.m. Wed.-Fri., 10 a.m.-1 p.m. Sat.; (860) 501-9278.

The Way We Worked - Groton Public Library, Route 117; 86 photos from a Smithsonian exhibition chronicling American workplaces from 1857-1987; tangential show called "Groton at Work" also on display; through Sat.; 9 a.m.-9 p.m. Mon.-Thurs., 9 a.m.-5:30 p.m. Fri., 9 a.m.-5 p.m. Sat.; (860) 441-6750.

Art=Gift - Hygienic Art Galleries, 79 Bank St., New London; annual holiday show featuring dozens of regional artists who created special pieces with gift-giving in mind; through Jan. 3; 11 a.m.-3 p.m. Tues.-Thurs., 11 a.m.-6 p.m. Fri. and Sat. and noon-3 p.m. Sun.; (860) 443-8001.

Faculty Exhibition - Lyme Academy College of Fine Arts' Chauncey Stillman Gallery, 84 Lyme St., Old Lyme; sculpture, painting, drawing and illustration by 13 studio faculty members; through Jan. 10; 10 a.m.-4 p.m. Mon.-Sat.; (860) 434-3571.

Deck the Walls - Lyme Art Association, 90 Lyme St., Old Lyme; more than 100 works of original art by association members on display and priced to sell for holiday gifts; also, a show of landscapes, "Celebrating Lyme's Beauty"; both run through Jan. 3; 10 a.m.-5 p.m. Mon.-Sat. and 1-5 p.m. Sun; (860) 434-7802.

Holiday Exhibit - Maple and Main Gallery, One Maple St. Chester; through Dec. 31; 11 a.m.-6 p.m. Wed.-Sat., 11 a.m.-5 p.m. Sun.; (860) 526-6065.

International Marine Art Exhibition and Sale - Maritime Gallery, Mystic Seaport, 47 Greenmanville Ave., Mystic; works by David Bareford, Harley Bartlett, Laura Cooper, Yoko Gaydos, Ian Hansen, Neal Hughes, Richard Loud, Victor Mays and Jeff Weaver; through Dec. 31; 10 a.m.-5 p.m. daily; (860) 572-5388.

Holiday Arts Show - Mystic Arts Center, 9 Water St., Mystic; through Dec. 31; 11 a.m.-5 p.m. daily; (860) 536-7601.

Loose Association of Plein Air Artists - Mystic & Noank Library, 40 Library St., Mystic; during library hours through Dec.; (860) 536-7721.

Holiday Show 2014 - Pratt-Wright Gallery, Main Street, Noank; art works and hand-crafted objects; through Jan. 3; 11 a.m.-5 p.m. Thurs., Fri. and Sun., 10 a.m.-6 p.m. Sat. and by appointment; (860) 912-0555.

Scenes From Ivoryton - Six Summit Gallery, 6 Summit St., Ivoryton; mini-sculptures of Ivoryton along with over 200 smaller works; through Dec. 31; 11 a.m.-5 p.m. Wed., 11 a.m.-6:30 p.m. Thurs., 10 a.m.-6:30 p.m. Fri., noon- 4 p.m. Sat. and Sun.; (860) 581-8332.

Kindness of Strangers - Spectrum Gallery, 61 Main St., Centerbrook; crafts and fine art reflecting compassion and goodness; through Jan. 11; 11 a.m.-6 p.m. Wed.-Sat., 11 a.m.-5 p.m. Sun; (860) 767-0742.

Holiday Art Show - Studio 33 Art and Framing Gallery, 140 Bank St., New London; works by large group of local artists; through Jan. 16; 9 a.m.-5 p.m. Tues.-Fri., 10 a.m.-3 p.m. Sat.; (860) 442-6355.

Model of Coast Guard Cutter Courier - U.S. Coast Guard Academy, 15 Mohegan Ave., New London; display of a model of the Cold War-era Coast Guard cutter Courier, which served as a radio-relay station for the federal government's "Voice of America" broadcast program; 9 a.m.-4 p.m. weekdays and 10 a.m.-4 p.m. the first and third Saturday of each month.