Driving down Grange Avenue around the border of Hales Corners and Greendale, the two towns look like typical pleasant suburbs, with assorted shops, strip malls, small businesses and parks mixed in between the cozy subdivisions and homes. And then you come across Trimborn Farm, a seven-and-a-half-acre time machine back to the 1800s, providing a glimpse at the history of the two towns and the city of Milwaukee.