Stopping on cruise ship tour - deciding between two tours - the Roman Catacombs, Pompey's Pillar & Alexandria Museum OR Fort Qait Bey, the Lighthouse and the Library of Alexandria. I like the idea of seeing the lighthouse and library but are these going to be basically ruins where the other tour will be of more museum/artifacts, etc.? I see on the popularity listing on Trip Advisor that the first choices are the more popular. Also - could we not just take a taxi to see the lighthouse and library ruins and how far would that be from the cruise ship port? Thanks for any advice.