Acadia National Park is visited by more than 2 million tourists every year. However this location is not visited for its rock (such as Yosemite), but for its reputation as the first place the sun touches in the USA (Cadillac Mtn.), and for its beautiful ocean views, as well as for ocean kayaking.
There are many areas in Acadia that make the long drive to get there more than worth it. Try to limit yourself to coming in the warm season (May-late September). Climbing by the ocean when it is cold out is a unpleasant experience.