Day 1 — Zurich Altstadt. Grossmünster, Fraumünster, Lindenhof, Limmatquai.
Day 2 — Rhine Falls + Schaffhausen. Half-day at the falls, afternoon in the medieval old town of Schaffhausen.
Day 3 — Lake Zurich. Boat trip to Rapperswil, ice cream at Bürkli, evening swim at Seebad Enge.
Day 4 — Uetliberg. Zurich's mountain (871 m). 30-minute train, two hours of forest hikes, panoramic city view at sunset.
Day 5 — Mountains day trip. Mount Rigi or Pilatus by train. Snow-capped peaks within 2 hours of Zurich.