Arkhangelsk Oblast the south-west of the Oblast drains into the Kema River which belongs to the basin of the Caspian Sea. The area in the Onega River basin containing the biggest lakes in the oblast, such as Lake Lacha, Lake Kenozero, Lake Undozero, and Lake Kozhozero. The tundra of the Nenets Autonomous Okrug also contains a number of bigger lakes. The river basin of the Pinega is characteristic of the karst, with a number of caves in the region. The White Sea coast within the Oblast is split into the Onega Bay (where the Onega is the major tributary), the Dvina Bay
Butuan Bay Butuan Bay Butuan Bay is a bay and extension of the Bohol Sea a.k.a. the "Mindanao Sea", in the northeast section of Mindanao in the Philippines. Its main river source is the Agusan River, which empties into the bay at the coastal city of Butuan. Butuan Bay is completely contained with the Agusan del Norte province. Butuan Bay has only two major ports, the Port of Nasipit in Nasipit and the Port of Masao a.k.a. "Masao River Port" in Butuan City. The Port of Masao is Butuan City's seaport, and it was built to avoid having the city depend on