Cross into the Green Mountain State from Massachusetts on Interstate 91, and you might feel as if you’ve entered a new country. There isn’t a town in sight. What you see are forested hills punctuated by rolling pastures. When you reach Brattleboro, no fast-food joints or strip malls line the exits to signal your arrival at southeastern Vermont’s gateway city. En route to downtown, you pass by Victorian-era homes on tree-lined streets. From Brattleboro, you can cross over the spine of the Green Mountains toward Bennington and Manchester.