Today on Designing Worlds we're visiting the four sims of Al Andalus in Second Life, and take a tour of some of the quite remarkable World Heritage sites recreated there, including the castle and palaces of the Alhambra. We'll also discover a little about the philosophy behind these SL regions.

The show begins at 2pm SLT (22:00 GMT) and you can watch live either in our studio at Northpoint, or here at the Treet.TV site - just click the "Watch LIVE" button.