Rigi, the queen of the alps (Google Map) — near Lucerne
— car to Vitznau, (68) cablecar to Rigi and back
— car to Lucerne, (120) boat to Vitznau, cablecar to Rigi and down to Weggis, boat to Lucerne
— car to Lucerne, (110) boat to Vitznau, cablecar to Rigi and down to Art-Goldau, train to Lucerne
Bärglistüberwaterfall, Canton Glarus, Klausen pass road (Google Map), 1.5 hour car ride. Better yet, take the whole Klausen pass route to Kanton Uri and Axenstrasse back, along the lake of Lucerne.
Longer tours (may take more preparation, or even an overnight stay)