The 180-acre Locust Grove is the estate of Samuel F.B. Morse (1791-1872), patent holder on the electromagnetic telegraph and creator of an early version of Morse code. The site contains an Italianate villa, housing a collection of European and American art and decorative arts. The grounds hold gardens. Exhibits include telegraph technology and paintings by Morse himself. Morse lived on the estate between 1847 and his death in 1872.

The site offers an introductory film, exhibits, period rooms, five curriculum-based educational programs, a summer day camp, guided tours of the villa, 100-minute group gardens and grounds tours, 2-hour group villa and gardens tours, and trails. Reservations are required for all group tours.

Historic Speedwell presents mid-19th-century life through the estate of Stephen Vail (1780-1864), proprietor of Speedwell Iron Works. The site highlight is the factory building where Alfred Vail (1807-1859) and Samuel F.B. Morse (1791-1872) completed and publicly demonstrated the electromagnetic telegraph in 1838. Other structures include an operational waterwheel; the Vail Home, furnished to an 1844 to 1864 appearance; 1849 carriage house; several residences; and a historic granary.

The site offers period rooms; traditional and interactive exhibits; guided tours of the factory building, Vail home, and Wheelhouse; hands-on workshops; Scout programs; and educational programs.