A Michigan couple has completed a quest to visit all 3,108 counties in the lower 48 states—closing out the task with their trip to Nantucket. Jennifer and Jonathan Riehl completed their journey this week when they boarded a ferry to the island. The couple from Hancock have done it all in the same vehicle—a green 1999 Dodge Intrepid with more than 540,000 miles. They tell the Cape Cod Times they've had their share of adventures, including encounters with bears and an avalanche. They started in 2006 with small trips, and now typically drive about 50,000 miles a year. Their next goal is to finish visiting Alaska's boroughs, and start on Hawaii. (A Delaware man has actually visited all 3,143 US counties.)