Dr. Shaw wasn't stupid, and she knew people would question the morals of her experiments. So she found an island out in the middle of nowhere and had a lab and housing built, which was only expanded upon when the Greeks came into power on the island. They have access to a helicopter to get more supplies and more people. An island is easier for them to be able to control the experiments, and if they manage to escape or get out of hand then it is easier to contain the issue.
Dr. Shaw wasn't stupid, and she knew people would question the morals of her experiments. So she found an island out in the middle of nowhere and had a lab and housing built, which was only expanded upon when the Greeks came into power on the island. They have access to a helicopter to get more supplies and more people. An island is easier for them to be able to control the experiments, and if they manage to escape or get out of hand then it is easier to contain the issue.