it includes airdrie, an estate including of an original 2,000 acre area purchased by robert alexander in 1790. airdrie includes 19 contributing buildings, including a c.1903 house, the w.e. simms residence, built by r.w. lacefield & sons of midway, which is "an impressive colonial revival mansion". it includes tenant houses, other buildings supporting the main house, and agricultural buildings, as well as a c.1917 landscape designed by landscape architect jens jensen. its stone entry gates (c.1870) on the south side of the old frankfort pike, are a contributing structure.