Owned and operated by the Mashantucket Pequot Tribal Nation, the Museum and Research Center presents the history and culture of the Pequot and other North American Native peoples, as well as exploring the natural history of the continent.

The museum offers exhibits, guided tours and enrichment programs for school groups, in-class outreach presentations, on-demand professional development workshops, and research library access.

Renowned French Impressionist paintings—four by Claude Monet, three by Edgar Dega—and notable works by Édouard Manet, Mary Cassatt, and James McNeill Whistler are highlights of the Museum's in situ exhibition. The 152-acre property features an Arts and Crafts carriage barn and theater, stone garages, woodland trails, a pond and dairy complex, and a Sunken Garden designed by Beatrix Farrand c. 1920.

The museum offers exhibits, tours, research library access, educational programs, and recreational and educational events.

The Museum provides professional scholarship, preservation, and historical programming about Mattatuck heritage, stimulates interest in the fine and decorative arts of Connecticut by showcasing their highest quality and expression, and encourages an appreciation of the humanities and the fine arts through its collections, exhibits, and programs. It houses permanent local history and art exhibits.

The museum offers exhibits, tours, reference library access, educational programs, and recreational and educational events.

The Harriet Beecher Stowe Center preserves and interprets Stowe's Hartford home and the Center's historic collections, promotes vibrant discussion of her life and work, and inspires commitment to social justice and positive change. A visit to the Center includes the Harriet Beecher Stowe House, a Victorian Gothic Revival home (1871) which includes Victorian-style gardens; the Katharine Seymour Day House (1884), a mansion adjacent to the Stowe House; and the Stowe Visitor Center (1873), with changing exhibitions.

The center offers exhibits, tours, reference library access, and occasional recreational and educational events.

Located on the historic Cos Cob Harbor, home of Connecticut's first art colony, the Society's facilities include the National Historic Landmark Bush-Holley House (c. 1730); the Visitor Center, housed in a former village post office (c. 1805); the Hugh and Claire Vanderbilt Education Center, set in a mid-19th century barn and artists' studio; and the William E. Finch, Jr. Archives.

Bush-Holley House is the centerpiece of Bush-Holley Historic Site on Cos Cob Harbor. A unique dual interpretation provides visitors with two distinct museum experiences that portray the history of the house: the era of the Bushes, a colonial family who lived and farmed on the site from 1790 to 1825, and the Cos Cob art colony period from 1890 to 1920. Eight rooms tell a story of change over time, beginning with the turn of the 20th century and moving backward in time to the Federal era. On the outside the historic buildings, landscape and gardens are restored to c. 1900.

The society offers exhibits, educational programs, research library access, and recreational and educational events; the Bush-Holley Historic Site offers tours and occasional recreational and educational events.

Roseland Cottage depicts the summer life of a prosperous family in mid 19th-century America. Built in 1846 in the newly fashionable Gothic Revival style, the house provided a seasonal escape from a more formal city existence for Henry Chandler Bowen and his family. Bowen, a Woodstock native, made his fortune in New York and became an active abolitionist, Congregationalist, and Republican.

The cottage offers tours and educational and recreational programs.

New-Gate Prison, one of Connecticut's first prisons (1773—1827), was housed in an abandoned copper mine. Today, visitors enter the prison yard through 12-foot-tall walls. The brick guardhouse still stands and houses exhibits, but only ruins remain of the other prison buildings. A modern stairway provides access underground where air temperature is always in the 50s.

The site offers exhibits, tours, and educational and recreational programs.

The Salmon Brook Historical Society seeks to preserve and share the history of Granby, Connecticut. To this end, the society operates four museum buildings. The circa 1732 Abijah Rowe House has been restored to an early 1800s interior appearance. It also houses a collection of Victorian toys. The circa 1790 Weed-Enders House houses the society research library and a Victorian parlor. The circa 1870 Cooley School House has been furnished and styled to a 19th-century appearance. The circa 1914 Colton-Hayes Tobacco Barn offers a recreated Shaker meeting house; town microcosm; and exhibits on vernacular items, Native American artifacts, and the Civil War.

The society offers exhibits, period rooms, and library access. The museum buildings are open between June and September. Reservations are required for groups.

The Connecticut Commission on Culture and Tourism promotes the arts, film, historic preservation, museums, and tourism in Connecticut. The commission operates four museums—the Henry Whitfield State Museum, the Prudence Crandall Museum, the New-Gate Prison and Copper Mine, and the Sloane-Stanley Museum. The Henry Whitfield State Museum, Prudence Crandall Museum, and New-Gate Prison and Copper Mine are listed separately in this database. The Sloan-Stanley Museum presents U.S. craftsmanship heritage and the local iron industry. Displays include hand tools, the studio of artist Eric Sloane (1905-1985), a replica circa 1800 cabin, and the remains of a granite blast furnace located on site.

The Sloane-Stanley Museum offers exhibits.