What to see in Zurich

I’m going to be in Zurich for 3 days at the end of October. Any suggestions for what to see/do in the area?

Glacier tours are popular. See them before they melt.

Einsiedeln is an easy day trip by train. It’s an eighth century monastery, still active, I believe, and it has a lot of interesting art and historical artifacts. IIRC the scenery during the train ride is well worth it.