Arkhangelsk Oblast eventually spread well beyond the Arkhangelsk Region. The Mezen horses, bred in the Mezen River valley, are rather small but suitable for difficult work and easily survive cold winters. The area of current Arkhangelsk Oblast has always been located on the trading routes connecting central Russia to the White Sea, and, in fact, in the 17th century the White Sea was the main sea export route for Russia. The whole course of the Northern Dvina is navigable, as well as the lower course of some of its tributaries, most notably the Vychegda, the Vaga, and the Pinega. The Mezen is
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