Bring your good running/walking shoes because you'll need them to climb to the top of this wonderful monument in Charlestown! The attraction is free and you can enjoy ample parking around the monument. It can get tiring and obviously it is not handicap accessible. The only drawback is that the view at the top is not that great, and your legs if you aren't in shape will hurt for days.
Pros: Free, Good parking
Cons: Bad views