Cadillac Mountain in Acadia National Park is a must-visit spot for breathtaking views on the eastern seaboard. The highest point in the area, it offers a paved trail, interpretive signs, and a gift shop at the summit. Originally popular with tourists in the late 1800s, efforts to preserve the summit began in the early 20th century. Vehicle reservations are required from mid-May to mid-October, so plan ahead if you want to drive up. Be prepared for changing weather conditions and crowded parking lots, but don't miss the chance to experience this iconic destination.