How the country lays out
Rwanda is small enough that every destination on this list is within half a day's drive of Kigali. Practically, itineraries run on three axes. North: Kigali to Musanze for the volcanoes, then west to Rubavu on Lake Kivu. South: Kigali through Muhanga and Nyanza to Huye, then over the ridge to Nyungwe and down to Rusizi. East: Kigali to Akagera and back.
The lake road linking Rubavu, Karongi and Rusizi joins the northern and southern axes into a full circuit — slower than going back through Kigali, and much better.
Note that most Rwandan towns were renamed in the 2006 administrative reorganisation. Older guidebooks and maps still use Ruhengeri, Gisenyi, Kibuye, Cyangugu, Butare and Gitarama; both names are given here.