Places to visit on weekends other than malls

Greetings to all!
I recently moved to Riyadh from a smaller town called Ha'il and i was expecting more fun and exciting places to visit in Riyadh other than malls but unfortunately i can't find any decent place to visit or to see. Please suggest me "must visit" places in this city,

Follow Blue Abaya blog. She has a list of things to do in Riyadh and constantly finds new places