The Calgary Zoo is located near downtown Calgary. They have Botanical Gardens and the Prehistoric Park.
Every winter, the Zoo has a Christmas light show called Zoolights.
1300 Zoo Road NE Online map
You can get there from Memorial drive near Deerfoot Trail or by going North on 12 St NE.
Zoo hours: 9:00AM-5:00PM, buildings close at 6:00PM
A coupon for a free children's admission is available here.