Built in 1912 for John Wingate Weeks, atop Prospect Mountain overlooking the Connecticut River, it is one of the state's best preserved early 20th-century country estates.

It features hiking trails, expansive views of the countryside from the stone observation tower, and a small museum in the main estate house.

It consists of the entirety of Prospect Mountain, a low peak that at 2,037 feet (621 m) above sea level is the highest on a short ridge running east from the Connecticut River.

A narrow auto road, about 2 miles (3.2 km) in length, provides access from Route 3 to the summit area, where the estate buildings are located.

The circular stone tower, originally fitted with a central water storage tank, is open to the public, and provides expansive 360° views of the countryside.