World-class art collection including the Mona Lisa and vast galleries; book timed tickets in advance — open ~9:00am–6:00pm (closed Tuesdays); check seasonal hours.
Stroll the island, visit Sainte‑Chapelle stained glass (usually open 9:00am–7:00pm) and see Notre‑Dame’s exterior and surroundings while restoration continues.
Combine a paddle‑steamer on Lake Lucerne and the world’s steepest cogwheel railway (or cableway) up Pilatus; operations typically run year‑round but check for maintenance/seasonal schedules and book return slots.