It is on this island that Ciri is hiding from the Wild Hunt. You will visit this island only once and you will not be able to return to it, so collect all the treasures that can be found here before you save all the dwarfs and complete "The Isle of Mists" quest.
After a long search Geralt was at last a step from his goal. Avallac'h had hid Ciri from the Hunt on the magical Isle of Mists, which could only be reached if fate deemed one worthy - or by following a magic firefly, which was decidedly the easier option. Geralt thus readied himself to sail to the isle and bring back Ciri.

Quest-related x5, Tresures x30, Tunnels x4
The following legend of Isle of Mists interactive game map defines the points of interest / markers displayed on the map. Each marker corresponds to a specific element to facilitate efficient navigation and interaction with the map.
Places, NPCs and other elements related in some way to the quests available in the game.
Places where there are usually chests containing some nice loot.