It was built in the beginning of the 15th century and represents a massive beehive bath from stone, situated in the beginning of the valley leading to the port, and half a kilometre apart from the town centre. Many stone anchors, amphorae and ceramics found during the underwater archaeological expeditions are exposed there. Coins from different epochs and a golden Thracian treasure can be seen in the Treasure House Hall The ancient and mediaeval colour painting expend our concepts for the ancient navigation around Dobruja's coasts.