In the bay of Brbišćica on the southwestern side of Dugi otok is a natural phenomenon called Zmajevo Oko (Dragon's Eye). It was formed by the wear of the limestone rock in which it is located. Experienced swimmers and divers with enough courage can dare and dive through the underwater corridor that separates Zmajevo Oko from the sea. The whole bay of Brbišćica is an interesting geomorphological location because of traces dating to the prehistoric time that were discovered in the immediate vicinity of the bay. Namely, a dinosaur fossil was found on the steep slopes, so the bay area has been declared a protected natural landscape. The interesting sea cave Golubinka is another natural attraction that is located in the bay Brbišćica near Zmajevo Oko.
