The northeast is covered by the southern part of Lake Rweru, which extends north into Rwanda and east into the Commune of Giteranyi.

[2] The Muhere Forest is to the west of Lake Rweru and east of the RN 14 highway, which crosses into Rwanda to the north of Gasenyi.

The portion of this ecosystem in Burundi in limited to the northeast, and includes the Ruvubu National Park and the Murehe Forest Reserve.

[8] Around Lake Kanzigiri there are wooded savannahs dominated by plants such as Pericopsis angolensis, Parinari curatellifolia and Hymenocardia acida, which indicate Zambezian influences.

[10] Busoni is divided into 42 collines, from north to south:[11] In 2008 the OPEC Fund for International Development announced a project to build a paved road running 37 kilometres (23 mi) from the city of Kirundo to Gasenyi and the border with Rwanda.