This is one of several Siberian Tigers that are at the Calgary Zoo. It is quite an amazing/uncomfortable feeling when one of these enormous animals is perhaps three or four feet away from you and locks eye contact with you, LOL!

Later note added on 14 June 2012:
Tigers that used to be known as Siberian Tigers are now known as Amur Tigers. The name change is because their range now only includes the Amur Valley in Eastern Siberia.