Fjallsjokull is an outlet glacier of Oraefajokull and is located in Vatnajokull National Park, not far from Skaftafell.
At this glacier you'll be able to enjoy impressive ice formations and dramatically carved landscape, with a great view of nearby mountains and crevasses. You'll also get to see ice crashing to down the mountain towards the ocean, a truly impressive sight.
By the glacier is a small and beautiful ice riddled glacier lagoon called Fjallsarlon. Breida river then falls from the glacier into the larger Breidarlon and a bit further off is the most famous of the Icelandic glacier lagoons, Jokulsarlon. A few more glacier lagoons then follow further east.