The Pine Tree State (USA) is the state of Maine. Maine is located in the northeastern United States and is the 12th smallest state by area. It is bordered by New Hampshire to the west, the Atlantic Ocean to the southeast, and Canada to the north and east. Maine is known for its rocky coastline, picturesque lighthouses, and seafood cuisine. The state is also home to Acadia National Park, which is one of the most visited national parks in the United States.