Aare River in the canton of Bern.
Breathtaking view of the river. They are renovating the Bear Pit so the bears will be back Autumn 2015.
Directions: Depending on where you are in Zurich, get to Zurich HB and take the train to Bern (about an hour). There's only one train from Zurich to Bern so you can't really get lost. When you arrive in Bern, take the 12 and you'll end up at the Bear Pit. You cannot miss it.
Cost: 100 CH round trip from Zurich HB.