Several museums and historical sites around the county are participating in the 14th annual Connecticut Open House Day on Saturday, June 9. The event, sponsored by the state tourism department, highlights the variety of experiences available within Connecticut with free or discounted admission and other special offers for more than 225 destinations.

For a complete list of participating organizations and businesses, visit ctvisit.com/ctopenhouseday.

Avery-Copp House Museum — 10 a.m.-4 p.m., 154 Thames St., Groton; tours, children’s games, and historic re-enactors; free; (860) 445-1637.

Bill Memorial Library — 10 a.m.-4 p.m., 240 Monument St., Groton; book and art sale and children’s crafts; (860) 445-0392.

Ebenezer Avery House — 10 a.m.-4 p.m., Fort Street, Groton; historical tours; free; sglantiere@aol.com.

Abbey’s Lantern Hill Inn — 11 a.m.-4 p.m., 780 Lantern Hill Road, Ledyard; guided hike of the inn’s trail and part of the Pequot Trail; free; (860) 572-0483.

Monte Cristo Cottage — 10 a.m.-2 p.m., 325 Pequot Ave., New London; tours of Eugene O’Neill’s boyhood home; free; (860) 443-0051.

Custom House Maritime Museum — 1-5 p.m., 150 Bank St., New London; free admission; (860) 447-2501.

Hempsted Houses — noon-4 p.m., 11 Hempstead St., New London; Juneteenth celebration; free; (860) 443-7949.

Lyman Allyn Art Museum — 10 a.m.-5 p.m., 625 Williams St., New London; buy-one-get-one admission; (860) 443-2545.

Old Town Mill — noon-4 p.m., 8 Mill St., New London; historical tours; free.

Shaw Mansion — 10 a.m.-4 p.m., 11 Blinman St., New London; historical tours and discounted membership; free; (860) 443-1209.

Mashantucket Pequot Museum and Research Center — 9 a.m.-5 p.m., 110 Pequot Trail, Mashantucket; discounted admission and educational demonstrations; 800-411-9671.

Denison Homestead Museum — noon-4 p.m., 120 Pequotsepos Road, Mystic; historical tours; free; (860) 536-9248.

Mystic and Noank Library — 9 a.m.-1 p.m., 40 Library St., Mystic; children’s crafts; free; (860) 536-7721.

Mystic Aquarium — 9 a.m.-5:50 p.m., 55 Coogan Blvd., Mystic; discounted admission; (860) 572-5955.

Children’s Museum of Southeastern Connecticut — 9:30 a.m.-4 p.m., 409 Main St., Niantic; discounted admission; (860) 691-1111.

Smith-Harris House Museum — 10 a.m.-3 p.m., 33 Society Road, East Lyme; historical tours, reenactors and refreshments; free; (860) 739-0761.

Thomas Lee House — 10 a.m.-3 p.m., 228 West Main St., Niantic; activities and tours of the house and the schoolhouse; free; (860) 739-6070.

Leffingwell House Museum — 11 a.m.-4 p.m., 348 Washington St., Norwich; historical self-guided tours; free; (860) 889-9440.

Norwich Heritage and Regional Visitors’ Center — 10:30 a.m.-5 p.m., 69 East Town St., Norwich; guided tour of the burial grounds and Colonial life presentation; free; (860) 886-1776.

Slater Memorial Museum — 1-4 p.m., 108 Crescent St., Norwich; exhibit opening; free; (860) 887-2506.

Indian and Colonial Research Center — 11 a.m.-4 p.m., 39 Main St., Old Mystic; collections tour; free; (860) 536-9771.

Tantaquidgeon Museum — 10 a.m.-3 p.m., 1819 Norwich-New London Turnpike, Uncasville; tour of the oldest museum owned and operated by Native Americans; free; (860) 848-3985.Waterford

Eugene O’Neill Theater Center — noon-4 p.m., 305 Great Neck Road, Waterford; ticket vouchers for upcoming conferences; free; (860) 443-5378.