Palermo looks like a city full of charm and narrow streets, so I'm wondering if walking might be a better option than using Hop On Hop Off Palermo (https://www.hop-on-hop-off-bus-tours.com/tour-city-sightseeing-palermo-hop-on-hop-off-bus-tour). Has anyone compared both? I enjoy exploring on foot, but I also don't want to miss major attractions or waste time figuring out routes. These Palermo bus tours seem like a good overview of the city. Would you recommend starting with the bus and then exploring on foot, or skipping it altogether?