The fieldstone tower in front of the house, listed in the National Historic Lookout Register, was originally built as both an observatory and water tower. At 56 feet high, its observation deck affords expansive views of the New Hampshire and Vermont countryside. One of Weeks' motives for erecting the tower and for building the road to the summit, was to ensure that local residents and visitors could enjoy the spectacular views from the top of Mt. Prospect. In 1941 a fire observatory was added to the top of the tower, which is maintained by the N.H. Division of Forests and Lands.