Old Poway Park is a 4.75-acre park which houses two historic buildings that were moved to the site and restored. Included are Poway's first public assembly building, the International Order of Good Templars Hall (name consistency) and the Nelson House. The three existing buildings, the Porter House, the Hamburger Factory, and Historical and Memorial Society Museum were refurbished. A train barn was built to house the 1907 Baldwin No. 3 Steam Engine, a 1938 Fairmont Speeder and ore cars, a 1894 L.A. Yellow Trolley, and a San Francisco Cable Car. An Overshiner's blacksmith and gazebo were built to enhance the ambiance of the turn-of-the-century setting.

A 2-acre green park for picnics was styled after the Teddy Roosevelt National Park system. The Green Park is open to the public, and the lawn area and picnic tables are available on a first come, first serve basis, and are not rented or reserved.