This is a map of the whole world. Jhelom is the highlighted section. The easiest way to get to this town is to use a moongate, but I guess you could take a boat if you want.
This is a map from the actual game. Jhelom has 3 islands (From NW to SE)-
First Island: My house is in the jungle, marked with a waving guy on both maps. There is a limited amount of space to build another two or three houses. This island also has horses, and sometimes Llamas and Raziel*.
Second Island: This is the main island. All the shopkeepers, healers, merchants, and Wandering Escorts are here. The graveyard and the moongate are located on this island, and you can travel to the other two islands from here.
Third Island: This island has a lot of buildings, but doesn't seem to have anybody living or selling there. It is kind of boring.
*I hate this mo-foe.