If you hike Mt Constitution without reading a bit of it's history, you will just get a memorable view. Yes there's a road for the tourists, but they miss some of the most beautiful untouched old growth and moss covered beauty anywhere. At Rosario resort, there is a free historical talk and organ concert, in which the history of Robert Moran and this park is playfully told. Call the resort for times. Also, if you prefer being away from the maddening crowd, I should tell you that at least 1/2 of Moran's 30 miles of trails are virtually deserted, even in prime time. Hint: come on a sunny off season weekend!
Pros: Free, Spectacular, Historical
Cons: Hard to get to, Mt Top crowded prime