 It is home to the Northern Maine Development Commission; it was listed on the National Register of Historic Places in April 1982, and delisted in 2015.The McElwain House is located at the northwest corner of Main Street and West Presque Isle Road, in a rural setting on the south side of Caribou.It is a large 2-1/2 story wood frame structure, with a truncated hip roof topped by a widows walk.