Update 1.6 adds the ability to explore the Golden Apple Archipelago and its many small islands in Genshin Impact. However, if you want to explore the islet in the far north corner, thick fog will prevent you from doing so. To get there, you need to complete the quest "Travel through the fog and wind".
Quest start
First of all, you need to find Unreadable Scraps. To do this, teleport to the fast travel point on the Twin Island, and then go to the west of the cliff and slide off it. In the rock you will see the entrance to the cave - go inside.
The passage in the cave is blocked by a destructible wall. Destroy it, then go to the passage where you will find the Unreadable Notes and the "Moon and Course" echo shell.
Head north
Swim to the island northwest of Parny Island. Then get on the boat and skip the time between 10:00 и 14:00... At this time, the wind will show you the right way through the fog. Just follow the wind until you reach the island to the north.
As a reward, three treasure chests await you at the top of the small island, as well as a fresco to be photographed to complete the quest “The other side of the island and the sea«.