Acadia is a 47, 000-acre national park located on Mount Desert Island in Maine. It is the oldest national park east of the Mississippi River and is known for its rugged coastline, granite peaks, and lush forests. The park is home to a variety of wildlife, including moose, deer, and bald eagles. Visitors can explore the park's many trails, lakes, and beaches, as well as take part in activities such as camping, kayaking, and biking.