Riyadh must-dos?
At the risk of an unusual question, I will be in Riyadh for the first time two weeks from now, staying at the Hilton Garden Inn in the center. I have read various websites with advice, but just have to ask this community whether there is anything that is both safe to do and should be done/visited in the city itself. Also visiting Muscat that week, also for two nights. Advice for that appreciated too.