Photo: Wandervogel, CC BY-SA 3.0 via Wikimedia Commons
Visit the top of the ski resort at 3456 metres altitude, using the gondolas and the Metro-Alpin train, considered the highest subway in the world. Great views of the Alps on a good day. In winter it can get very cold at the top, so wrap up warm. You can also have a meal in the revolving restaurant at the top (but it's pricey).
The Mittelallalin is a minor summit below the Allalinhorn situated above Saas Fee. This place is well known for the revolving restaurant which is the highest in the world and a glacier cave.
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7.8 km, 2 hr, easy
This leisurely walk takes you around the Mattmark lake, a hydraulic water plant. There is a restaurant at the bus stop with an exhibition on the construction and running for the hydraulic plant. The lake is also a good starting point for many longer hikes. The access road is only open during the summer months and the whole area is off limits during winter due to avalanche risk.
14 km slopes, 7 lifts
Another alternative with a smaller area.
This museum is housed in the old clergy house, which was built in 1732. It has exhibits on the traditions of the Saas valley as well as the history of the local tourism.
100 km in winter, 8 km in summer, 21 lifts
This is quite a huge ski area starting from Saas-Fee itself. From the village, there are 3 cable cars: Alpin Express and Spielboden, which lead to the same connected area and the separated Plattjen. While there are a couple runs for advanced riders (notably at the Plattjen area), most of the slopes are catered towards intermediate skiers and snowboarders. The easier runs can be found either in the village or on Feechatz slope, just above Langfluh. A quick word of warning about this run, it may be a nice run but you have to endure the longest t-bar lift and downloading is also recommended as the runs down are difficult for beginners and get very busy later on in the day. Special passes are available if you only want to use the Plattjien area or the lifts in the village.
Abenteuerwald
A rope park through the forest. There are two courses: a small one just for children and a big one for adults. The highlight certainly is the zip wire run over the canyon and back again.