When I want to pick up brochures and maps for the region I just arrived in, this official State of Maine visitors center is where I go. During open hours, the staff will answer your questions and help rote you where you want to go.
Bathrooms are available for humans and a dog walking area too.
I couldn't believe it was past 6pm and the Visitor's Center was still open! Normally stays open until 7pm. The lady was so nice and very helpful with maps and information on Bath hotels and restaurants.