In winter, the road to Stowe sees a lot of slope-seeking Saabs and Subarus. The summer crowd tends to be driven by ice cream: The Ben & Jerry's Factory in Waterbury is one of the top tourist destinations in Vermont. If your visitors have heard of one thing in the Green Mountain State, sadly, this is probably it. The guided tour doesn’t dwell on the company’s founding entrepreneurs — you have to search high and low for signs of Ben Cohen and Jerry Greenfield — but it maintains their “If it’s not fun, why do it?” philosophy.