A trading capital of the continental map I posted here: Xillihav. Olenis is within the Olene Lowlands which is a human-dominated territory-region. They do not let the "lesser sub-species" within their great cities or lands for fear of contamination - so Olenis is a human zone. The weird little bit coming off the bottom right, near the docks, is a sandbar. And yes, at the top, that is a wall going all the way to the island. They're attempting to make their city as defensible as possible. (I understand that building a wall out like that may be unlikely but it would look so cool if this were real that I couldn't resist.)

As for the second set of docks on the island, those are the military docks; they're close to the opening into the port so that they can defend more easily in case of an attack.

Click image for larger version. 

Name:	Coastal Town.jpg 
Views:	211 
Size:	547.0 KB 
ID:	51795