Boat from Luzern to Alpnachstad, then take the world's steepest cogwheel railway to Mt. Pilatus summit. Open 8am-5pm. Return via aerial gondola and bus.
Board train at Interlaken Ost via Lauterbrunnen and Kleine Scheidegg to Jungfraujoch, arriving near 10am. Enjoy snow activities and observatories. Return by late afternoon.