Jennifer and Jonathan Riehl , 32 and 31 , hit last county in Nantucket , MA . Pair drives about 50,000 miles a year in green 1999 Baxter State Park . Jonathan does most of the driving , while Jennifer navigates . Couples ' parents joined them for last trip of project , which began in 2006 . They use 16-hour days in the car to catch up on each other 's lives . Riehls plan on visiting boroughs of Alaska and then Hawaii .
Jennifer and Jonathan Riehl , 32 and 31 , hit last county in Nantucket , MA . Pair drives about 50,000 miles a year in green 1999 Dodge Intrepid . Jonathan does most of the driving , while Jennifer navigates . Couples ' parents joined them for last trip of project , which began in 2006 . They use 16-hour days in the car to catch up on each other 's lives . Riehls plan on visiting boroughs of Alaska and then Hawaii .