If you want to ski down the mountainside, you'll need to get to the top of it first. Hop on Retour Pendant and enjoy the ride.
You'll have no end of sightseeing choices when staying in Chamonix-Mont-Blanc. Retour Pendant is a great place to start here, but there are many other worthwhile spots to discover. Aiguille du Midi Cable Car, Aiguille du Midi, and Sea of Ice are not far from the mountainside transportation system and will top off your day nicely.