What are the best lighthouses to visit in Maine?

1. Bass Harbor Head Lighthouse
2. Nubble Lighthouse
3. Burnt Island Lighthouse. It's near Boothbay Harbor (Maine). You can kayak to it. It's on a small island.
4. Portland Head Light  
5.  Cheryl, I didn't realize this was one of your other questions.

Pemaquid Point Lighthouse Parkis my favorite lighthouse. Acadia National Park is a must, but Bar Harbor is very touristy. You can find much cheaper places to stay in Bangor. Camden (Maine) is expensive and crowded, try Rocklandor Boothbay Harbor for the midcoast. Portland (Maine) is worth a day of exploring. The beaches in the south are beautiful, try York (Maine) and visit the Stonewall Kitchen York Company Store. The mountains are beautiful too, lots of hiking options, and skiing in the winter. The Height of Land is breathtaking. 

Portland Head Light at Fort Williams in Cape Elizabeth is a must. It's the most photographed lighthouse in the world and the ride out there is beautiful.

This is a picture I took on a recent trip home.