4. National Marine Museum, Plymouth
If you are not just passing through Plymouth, you can find another one of the ten best places in Devon: the National Marine Museum. Visitors can learn more about the surrounding marine area and see educational exhibits. Exhibitions include those on Plymouth Sound, Eddystone Reef (this exhibit is one of the largest of its kind in all of Britain), and international ones about the Great Atlantic and Blue Planet, which includes information about Australia’s Great Barrier Reef.