Visit four of istanbuls world famous sights and one of its hidden gems on a full day private tour with lunch included with your very own guide explore the splendid blue mosque hagia sophia and topkapi palace then descend into the little known nakkas cistern a byzantine underground cistern where the arched vaults house an exhibition on istanbuls ancient hippodrome view the fascinating displays on the chariot racing arena and then explore the colorful grand bazaar stopping on route to