Five main peaks make up the roughly star-shaped massif of Snowdon, mentioned in Arthurian legend. At 1,085 m (3,560 ft), Snowdon's main peak is the loftiest point in England and Wales. The peaks are connected by sharp ridges, the product of intense glaciation. Lying within Snowdonia National Park, Snowdon can be ascended by a number of trails or by a railway that goes all the way to the summit. Climbers, hill walkers, sightseers, and fishers have made Snowdon a popular destination.