From north to south, major districts of the city are the residential area Batterie IV, Quartier Louis (known for its nightlife), Mont-Bouët and Nombakélé (busy commercial areas), Glass (the first European settlement in Gabon), Oloumi (a major industrial area) and Lalala, a residential area. The city's port and train station on the Trans-Gabon Railway line to Franceville lie in Owendo, south of the main built-up area. Inland from these districts lie poorer residential areas. North-west of Equatorial Guinea is where the city stands, labeling the city as a part of north-west Gabon. In terms of the country's surrounding boundaries, north is Cameroon, east is Congo, and south-east is the Democratic Republic of the Congo. It also rides the shores of the South Atlantic Ocean, which is on the country's west coast for reference. Additionally, in terms of aquatic geography, the Komo River passes through the city and empties into the ocean. The Komo River also stands as a potential hydroelectric source of power for the city which could generate supportive amounts of energy and power. Several city districts provide distinct and separate benefits throughout the city as well. In terms of nightlife, the Quartier Louis sector is most renowned. One of this zone's sides includes the coast, and this heavily influences the possible activities available in the area. Commercial areas within Libreville are housed in the Mont-Bouët and Nombakélé districts, which feature several shopping centers and stations selling purchasable goods. Oloumi contains much of the city's industry, integrating production separately from the districts that focus upon other aspects. Finally, Lalala and Batterie IV are residential and housing sectors, where much of the populace resides.