In North America, most buildings known as cottages are used for weekend or summer getaways by city dwellers. Cottage owners often rent their properties to tourists as a source of revenue. In Saint John, U.S. Virgin Islands, most cottages are vacation rentals used for weekend or summer getaways. In Michigan, a cottage normally means a summer residence farther north near or on a lake. An example of a colonial era cottage in North America is a small fieldstone house called Boelson Cottage in Fairmount Park, Philadelphia—one of the oldest extant houses within the city (c.1678–84).