The Mark Twain House and Museum was the home of Samuel Langhorne Clemens (a.k.a. Mark Twain) from 1874 to 1891 in Hartford, Connecticut, USA. Before 1874, Twain had lived in Hannibal, Missouri. The architectural style of the 19-room house is Victorian Gothic.

The Mystic Aquarium & Institute for Exploration is an aquarium and oceanography institute in Mystic, Connecticut. The Aquarium is one of only four U.S. facilities nation where people can see Steller sea lions and has one of the largest outdoor Beluga Whale exhibits in the United States. It is also among the first aquariums to attempt artificial insemination on a Beluga Whale. Some other exhibits include a ray touch pool, a penguin exhibit, and a bat cave.

Foxwoods Resort Casino is a hotel-casino in Ledyard, Connecticut on the Mashantucket Pequot Indian Reservation. Together with the MGM Grand at Foxwoods, it is one of the largest casino complexes in the world in terms of floor space for gaming. The entire resort comprises 4,700,000 sq ft (440,000 m) of space. The casino has over 380 gaming tables including blackjack, craps, roulette, and poker. Foxwoods also has the most slot machines of any casino in the world, numbering 6,300.

The Peabody Museum of Natural History at Yale University is among the oldest, largest, and most prolific university natural history museums in the world. It was founded by the philanthropist George Peabody in 1866 at the behest of his nephew Othniel Charles Marsh, the early paleontologist.

Old Newgate Prison was a Colonial American prison in what is now East Granby, Connecticut. It is now a historic site. The prison was originally a copper mine, opened in 1705, and is believed to be the first copper mine in America. After mining operations proved unprofitable, the colony of Connecticut converted it to a prison, like its London namesake Newgate Prison. The first prisoner, John Hinson, was committed for burglary in 1773.

Silver Sands State Park is a Connecticut State park in Milford, Connecticut, USA which offers facilities for swimming in the Long Island Sound, picnicking, trails, boardwalks and opportunities for bird-watching. It includes the 14-acre (57,000 m) bird sanctuary of Charles Island, which is rumored to be the site of Captain Kidd's buried treasure. Silver Sands is adjacent to the city-owned park, Walnut Beach.

Hammonasset Beach State Park is a state park located in Madison, a town in New Haven County, Connecticut, United States. It is Connecticut's largest shoreline park, with over two miles of beach. Activities include bicycling, boating, fishing, hiking, picnicking and swimming. The park has over 550 campsites available. The Meigs Point Nature Center offers programs and activities for park visitors on a limited year round basis.

Sleeping Giant (also known as Mount Carmel) of south-central Connecticut, with a high point of 739 feet (225 m), is a rugged traprock mountain located 8 miles (13 km) north of New Haven. It is part of the narrow, linear Metacomet Ridge that extends from Long Island Sound near New Haven, north through the Connecticut River Valley of Massachusetts to the Vermont border.