there is a conspiracy that the entire coast has melted and there is rising tensions over who will control the fresh continent. zog doesn't want you there and you don't go unless you are part of a research team that works on government contract. there is also ruins of old civilizations there. russia, china, and nato all want a chunk of it because its virtually untapped for resources.  basically, you can't just sail or fly there because you feel like it. they cite danger because the southern sea around it is actually quite dangerous. it's probably somewhere in the middle. zog control scheme + your going to die or get stranded possibly.
Bulgaria