No photograph of this spot yet — the map page's layers show exactly where it is.
The Deep Island is a conjectural region that covers the river that runs between the Volcano and The Redwood Forests. The name, The Deep Island, used to cover the entirety of the The Redwood Forests before the introduction of the Redwood Forests Biome, referring to the island within the center of map; but is now used to refer to the central area of The Island. The region name does appear in-game at sporadic intervals along the northern shore of the river, particularly to the west, which may be an oversight on the part of the developers when the new biome was introduced. The majority of this region is simply referred to as "Unknown Region", but has a unique and consistent spawn population.