The Slavers Fortress
When the Pirate King ran his operations from Frog Island, he built a fortress to house his operations just to the east of his mansion. When the Barony Navy landed and entered the fortress the pirates fought back fiercely and many died on both sides before the pirates were cleared out. The navy never came back to destroy the underground fortress and it sat empty for many years. However one of the soldiers who fought against the pirates, now a fugitive from the law, remembered the island and the fortress and hid out there. He was joined later by others and soon they began a new venture, the illegal capture and selling of human, halfing and elven slaves.