Working Girls' Vacation Society Historic District

The Hadlyme North Historic District is an 81-acre (33 ha) historic district located in the southwest corner of the town of East Haddam, Connecticut (just north of the town line with Lyme). It represents the historic core of the village of Hadlyme, which straddles the town line, and consists primarily of two north-south roads, Town Street (Route 82 and Old Town Street). The village arose around a church society founded in 1743, and grew with the development of small industries along area waterways. It was listed on the National Register of Historic Places in 1988.

East Haddam is a town in Middlesex County, Connecticut. The town is part of the Lower Connecticut River Valley Planning Region. The population was 8,875 at the time of the 2020 census.

Franklin Academy is a co-ed special education boarding school in East Haddam, Connecticut, serving students in grades 8-12 as well as post-graduate students. The school's primary mission is to provide education to adolescents and young adults with nonverbal learning disabilities and autism spectrum disorders.

The Hadlyme Ferry Historic District encompasses a collection of historic buildings related to the Chester–Hadlyme Ferry in the Hadlyme village of Lyme, Connecticut. It is located at the eastern end of the ferry route across the Connecticut River, where ferries have been documented to run since 1769. The district includes six houses dating to the late 18th or early 19th century, as well as the site of the ferry slip. It was listed on the National Register of Historic Places in 1994.

Gillette Castle State Park straddles the towns of East Haddam and Lyme, Connecticut in the United States, sitting high above the Connecticut River. The castle was designed and built by William Gillette (1853–1937), an American actor most famous for his portrayal of Sherlock Holmes on stage. Gillette lived here from 1919 until his death in 1937. The State of Connecticut purchased the property in 1943 for $29,000.

The Chester–Hadlyme Ferry is a seasonal ferry crossing the Connecticut River between the town of Chester, Connecticut, and the village of Hadlyme (in the town of Lyme, Connecticut). It is the second oldest continuously operating ferry service in the state of Connecticut and is a designated state historical landmark. The ferry is part of the scenic portion of Route 148 and provides a convenient link between two of Connecticut's tourist attractions: Gillette Castle State Park in Hadlyme and the Essex Steam Train, which runs between Essex and Chester.

The Warner House is a historic house at 307 Town Street in East Haddam, Connecticut. Built in 1738, it is notable for its high quality interior woodwork and hardware, the latter of which were probably made by some of its owners. The house was listed on the National Register of Historic Places in 1987. The house is now owned by Connecticut Landmarks, and in 2019 it opened as a historic house museum.

Selden Neck State Park is a 607-acre (246 ha) island and public recreation area on the Connecticut River in the town of Lyme, Connecticut. Accessible only by boat, the state park has four areas for primitive, riverside camping. Hiking, fishing, and hunting are also available. The park was among the first parcels secured for park purposes by the state, with initial land purchases on the island made in 1917. It is managed by Connecticut Department of Energy and Environmental Protection.

Beth Shalom Rodfe Zedek (transliterated from Hebrew as "House of Peace; Pursuers of Justice"), is a Reform Jewish congregation and synagogue, located at 55 East Kings Highway, in Chester, Connecticut, in the United States. The congregation is noted for the architecture of its "spectacular" building.

The Jonathan Warner House, also known as Warner-Brooks House, is a historic house at 47 King's Highway in Chester, Connecticut. Built in 1798, it is a well-preserved local example of Federal period architecture, featured prominently by architectural historian J. Frederick Kelly in The Early Domestic Architecture of Connecticut (1963). The house was listed on the National Register of Historic Places in 1978.

Millington is a village within the town of East Haddam, Connecticut. Millington lies halfway between East Haddam center and Salem center. It is the section of East Haddam that is the closest to Devil's Hopyard State Park. The village is connected to East Haddam Center and to Devil's Hopyard State Park by a series of secondary roads that are maintained by the state. The road is given an unsigned designation "Special Service Road 434", which runs on Mount Parnassus Road, Millington Road, Haywardville Road, and Hopyard Road. Millington includes the Millington Green Historic District which was listed on the National Register of Historic Places in 1996.The village is the site of the Millington Green, a small triangular town green in the center of the village at the junction of Millington, Haywardville, and Tater Hill roads. The Green contains a flagpole, bench, and perennial flower garden and is surrounded by several historic houses, including the Daniel Bulkeley House (built in 1792), the 10th District Schoolhouse (built in 1854), the Millington Green Parsonage (built in 1854), the Julius Schwab House (built in 1950 but incorporating a schoolhouse from 1756), and the Ebenezer Dutton House (built in 1766).Millington was first settled in 1704 by Jonathan Beebe of New London. An ecclesiastical society separate from Haddam (East Haddam was then part of Haddam) was granted in 1733. The congregational church was organized in 1736 and a meetinghouse constructed on the Green in 1740. The village became a training area for the local militia during the Revolutionary War. The village never recovered from a depression following the War of 1812 and is now a rural residential neighborhood.

The Deep River Freight Station is a historic railroad depot at 152 River Street in Deep River, Connecticut. Built in 1915 by the New York, New Haven and Hartford Railroad (NYNH&H), it is one of two surviving early 20th century stations on the southern end of the former Connecticut Valley Railroad (CVR) line. The building was listed on the National Register of Historic Places on December 21, 1994. It is now a station on the Valley Railroad, a heritage steam railroad.