OSRS features several islands that you can unlock by completing quests. They provide new training locations and unique monsters to kill. Also, they can be a good distraction from the OSRS grind.  Lithkren: This island is Northwest of Fossil Island. Translated from the Dragonkin language, it means “ Superior Fortress”. The location is visited during the Dragon Slayer II quest. After completing it, you’ll gain access to Rune dragons and Adamant dragons.  Entrana: This is a holy island Southwest of Taverley. Players cannot enter this area with weapons or armor due to the sacred location. Entrana is a great location for training Farming and Fishing.  Lunar Isle: After completing Lunar Diplomacy, players will gain access to the island. The quest is great to finish to acquire the new spellbook, which focuses on the utility side of magic. The island has an Astral altar, mine, general store, and Suqahs to kill.