Rigi is an imposing mountain massif along the northern shore of the lake Lucerne. On the another side of it is Lake Zug.
Note that there are several different ways to climb. The seemingly obvious climb to the summit (Rigi Kulm) is not necessarily the best in terms of views. From there you can clearly see Lake Zug, but poorly Lake Lucerne. Explore all the possibilities in advance. In addition, it is better to leave in the morning so that the sun does not light up Pilatus.