In January 2017, I spent 2 weeks in Rwanda. Of course I went to the Parc National des Volcans & Tracked Mountain Gorillas – This was one of my motivations for returning to Uganda & discovering Rwanda.
I also visited 4 different Memorials of the Genocide, one of the darkest episodes in Human History, each actually showing a different aspect of those horrid events: Kigali Memorial Center, Nyamata Genocide Memorial (near Kigali), Murambi Genocide Memorial (near Butare / Huye), Bisesero Genocide Memorial (near Kibuye / Karongi).
But there are various other aspects of the country that really deserve your attention and at least a few extra days! I also discovered: Kigali & Nyamata; Nyanza, Huye (Butare) and Nyamagabe in the South; Musanze (Ruhengeri) & the Volcanoes National Park in the North; and last but not least scenic Lake Kivu to the West, especially Karongi (Kibuye) and Rubavu (Gisenyi), conveniently linked by a ferry that makes the route twice a week.