The Gorham Historic District comprises forty-two buildings in the town center, along College Avenue, Main, Academy (formerly Maple), School, and State Streets. It is predominantly residential except for the eastern edge near the intersection of School and Main Streets which contains a concentration of commercial, fraternal, and religious buildings. Pre-1820 buildings are typically side-gabled Cape houses with large center chimneys (such as the pictured Peter Fogg House) or Federal-style houses with interior end chimneys.

Thought to be the oldest surviving building in Baldwin, the Burnell Tavern is a well-preserved, unadorned Colonial era house. It is clapboard sided with a side-gabled roof and two interior end chimneys. The symmetrical facade features a central entry located in a projecting vestibule. The door is flanked by sidelight windows and topped by a wide band of trim. The windows are made up of multiple small panes. There is a one-story ell that projects off the rear of the house and a secondary entrance sits on the south facing elevation. The tavern was built by Gideon Burnell, a local farmer.

Located on Route 3 with a view of Hulls Cove in Frenchman's Bay, Cover Farm is twenty-six acres and includes a house with formal gardens. The house dates to the early nineteenth-century and its cape form (a one-and-a-half-story side-gabled house and a large central chimney) is typical of houses constructed at that time. Subsequent additions were made in the nineteenth and twentieth centuries. The Cutler family likely purchased the land that became Cover Farm in 1810 and constructed the house shortly thereafter.

The Salmon Falls West Historic District is comprised of ten properties with five dating back to 1820 or earlier. The district is one of two architecturally significant areas in the village of Salmon Falls (see Salmon Falls East Historic District) that is bisected by the Saco River. Its late eighteenth- and early nineteenth-century houses are reminders of a bustling community of small scale manufacturing and mercantile establishments that served the town and the surrounding areas.

The Higgins Barn, located on Oak Hill Road, is a one-and-a-half story English barn on a fieldstone foundation and roofed with asphalt shingles. The front facade has an asymmetrically placed exterior sliding door. The frame is hand hewn with much of the structure supported on upright posts and mortised and tenoned together with oak pegs. The barn is a remnant of the agricultural history and early European-American settlement in Bar Harbor. Residing on the former Higgins Farm at Indian Point, the family migrated from Massachusetts in 1763 and remained here for the next 190 years.

Designed by John Kimball, Sr., an architect/housewright from Ipswich, Massachusetts, the McLellan-Sweat Mansion is an excellent example of Federal-style architecture. The house was built for shipping magnate Major Hugh McLellan. It is a three-story rectangular brick building laid in Flemish bond, a pattern that alternates the long and short sides of the brick. The symmetrical facade is dominated by an elaborate semicircular entry porch supported by Doric columns and topped by a balustrade or railing.

The Powers House is a large post and beam constructed late Colonial era building. Sheathed in unfinished clapboard siding and resting on a fieldstone foundation, the house has a hipped roof and large internal chimneys on each side. The facade is symmetrical with a central entry door. The door is framed by sidelight windows and a molded lintel. The windows are made up of multiple small panes. The eaves overhang the slightly smaller second floor windows. A one-story ell extends off the south elevation.

Thought to be the oldest known dwelling in Calais, the Holmes Cottage is a one-and-a-half story building with a side-gabled roof and a large central chimney. The front facade is dominated by a projecting vestibule added in the late nineteenth century. The wood framed and clapboard sheathed structure sits on a fieldstone foundation on Main Street. Local folklore dates the house to 1805-an era when the community was small and with little means. What is more likely, however, is that the house was not built until c.1820 when the lumber industry developed in Calais.

Construction on the Sargent-Roberts House began in 1814. Originally a simple Federal-style dwelling, the house, located on State Street, went through many renovations in the nineteenth century. A few characteristics of the original design remain including the symmetrical facade with a central door flanked by two single windows. Edward Sargent sold the house to Amos M. Roberts during the 1830s. Roberts, a wealthy lumberman and banker, began adding more opulent features to the three-story dwelling.

Located in Fort Point State Park, Fort Pownall looks out to where the Penobscot River meets Penobscot Bay. Originally the outer walls of the fort were ninety feet long and ten feet high and surrounded by a moat fifteen feet wide and eight feet deep with palisades placed in the middle for more protection. A drawbridge was used to enter the fort. Within the walls was a forty-four-foot blockhouse standing two-stories tall with diamond shaped flankers at each corner for riflemen. The whole fort was constructed of squared timbers, dovetailed at the corners and tree-nailed.