Lastoursville, situated along the Ogooué River in east-central Gabon, serves as the administrative center of the Mulundu Department within Ogooué-Lolo Province. Established in the late 19th century, the town has historical significance, having evolved from a slave depot named Mandji to its current designation in 1886. It developed around palm oil production and became a major missionary center. The town is also known for its caves, with over 40 identified in the surrounding primary rainforest, some containing traces of human activity dating back 7,000 years. These caves have been added to the UNESCO World Heritage Tentative List in the Mixed (Cultural + Natural) category. Lastoursville is accessible via the Trans-Gabon Railway and the N3 road, connecting it to other parts of the country. The town lies at an elevation of 206 meters.