Mompong Island- the farthest among the three with less than an hour of boat ride from Buyabod port, offers the distinctive geological formation locally known as “Ungab”a natural land bridge curved by incessant sea wave actions on a sedimentary rock formation (Early Pliestocene dominantly marine tuffaceous clastics) on the island extreme eastern portion, while a 2.5 km white sand beach on its original state is on the north. The only island with a small natural lake on its northeasterly side.