Phantasm Island is a large, and enriched in a lot of unique items to the island. It's home to only 2 types of trees, however at the northern most of the island is the volcano in which started the island itself. Though this version has no adventure concept, this island is perfect for those who wish to either have an island in which there's thousands of blocks of water around the island, as well as those who wish to have a potential adventure mode.
Phantasm Island is around 150k chunks in size total. This map is designed to transform with any version (Excluding the latest) of minecraft and almost any mods available. It repopulates with the version you have + mods. Meaning if you use something such as Pixelmon it will add gyms, pokecenters, etc. into it automagically.