If you want to ski down the mountain slope, you'll need to reach the top of it first. Hop on Rara Ski Lift and enjoy the ride.
You'll have no end of sightseeing choices when spending time in Marebbe. Rara Ski Lift is a good place to begin here, but there are loads of other interesting places to visit. Brunico Castles, Lake Braies, and Cron4 are near the mountainside transportation system and will round out your day nicely.