The turntable and engine house were built in 1921, and are a significant reminder of the railroad's historic importance to the development of the city.

[1] The Rockland Turntable and Engine House are located about 0.5 miles (0.80 km) west of the city's downtown, in the former rail yard sandwiched between Park Street (United States Route 1) and New Country Road.

The engine house is a wedge-shaped wood frame building, two stories in height, with a flat roof, clapboard siding, and a concrete foundation.

on the inner (east-facing) side of the wedge there are five entry bays, four of which retain track-mounted doors.

The outer portion of the turntable rests on a rail attached to the concrete retaining wall that encircles the structure.