They are 25 large brick structures which look like beehives, in two groups: 14 about 2.5 miles (4.0 km) west of the Catskill townsite, and 11 about two miles east of the townsite.
Each is about 28 feet (8.5 m) tall, with two 6 feet (1.8 m) arched openings, and 15 inches (0.38 m) thick brick walls.[2]