Originally Posted by AmazonChitlin

It's been a few years since I've been there, but look for events happening in Darling Harbour. The Sydney Zoo is also a nice place to go. In Darling Harbour you have the aquarium, some old ships, a mall, frequent free concerts and shows, etc.
If you decide to go out for an adult night out with your wife and want to club it up, go to Kings Cross. Be wary though, there are some trouble makers there. You can climb the Sydney Harbour bridge, but its expensive.

If i can think of anywhere else i'll reply again. Like i said, its been awhile. You're going to have a blast though! It's one of my favorite cities.