If you'd like to experience the alluring history of your new surroundings, spend an afternoon at Bastion 23.
You'll have no end of sightseeing choices when spending time in Algiers. Bastion 23 is a good place to begin here, but there are numerous other worthwhile spots to visit. Casbah, Algeria National Library and Great Mosque of Algiers are not far from the historic landmark and will round out your day nicely.