Mbandaka (mbaˈnda.ka, formerly known as Coquilhatville in French, or Coquilhatstad in Dutch) is a city on the Congo River in the Democratic Republic of Congo located near the confluence of the Congo and Ruki rivers. It is the capital of Équateur Province. The headquarters of the Fourth Naval Region of the Navy of the Democratic Republic of the Congo are located in Mbandaka. Mbandaka lies on the east bank of the Congo River below the mouth of the Ruki River, a tributary of the Congo. South of the Ngiri Reserve, a large area of swamp forest on the opposite bank of the Congo, it is located at the center of the Tumba-Ngiri-Maindombe Ramsar wetland. Mbandaka is the capital of Équateur province, and located only a few kilometers from the equator. It is home to Mbandaka airport and is linked by riverboat to Kinshasa and Boende. It is located in a busy travel corridor upriver from the capital, Kinshasa. The latter city of about 10 million is an hour's plane ride away, or a four- to seven-day trip by river barge. Mbandaka is largely populated by people of the Mongo ethnic group, although people from many different tribes and regions live in the city. The main languages spoken in Mbandaka are Lingala, French, and Mongo. Years of war and neglect have caused deterioration of the city infrastructure; large areas of the city are without electricity or running water. Most of the streets and avenues of the city are unpaved dirt roads. Mbandaka was founded in 1883 by British explorer Henry Morton Stanley, who named it "Équateurville". (At the time the territory was under the personal rule of King Leopold II, king of the Belgians and the official language was French.) The town hall is about north of the equator. Mbandaka is one of the closest to the equator of any substantial city in the world. Stanley placed a large "Equator Stone" near the riverbank south of the city to mark the point where he believed the equator crossed the river. It remains there today.