Life is competative. So is Death! The rivalry is fierce between the ctacombes of and the catacombes of San Gaudioso and San Gennaro. You're probably notgoing to visit two and it's not like selecting the right club for the weekend, since obviously both of these spots are underground. Here's the difference between the two. Despite being a burial place, San Gaudioso is a little more lively and indeed croded, when it comes to colorful depctions of the dead, while San Gennaro are Naples' oldest catacombs and blessed with later oppening hours.