Lake Foscari Map Achievement in Vampire Survivors

Note: This achievement requires you to have purchased and installed the Tides of the Foscari DLC so that you can access the 'Lake Foscari' stage.

Load up that stage, preferably with Sigma, and now you need to follow the green arrow to where the map is. Easier said than done, though, as this stage can be a bit of a pain to navigate without a map. I've provided a screenshot below that shows the map, and my character icon is where the map is located. So, as you can see from the image, you need to first get on the north side of the river that runs through the map. You can either go through the caves to the east, through the garden maze to the north, or just off to the west and then over the bridges. Once you've crossed the river, head to that dense tree section where the arrow is pointing. To get inside the trees, travel along the northern end of them and hold down until you reach a hidden entrance that opens up inside the forest and makes things visible. From there, simply head down to the map to grab it. Feel free to quit out immediately after grabbing the map to unlock this achievement.