Catacombe di San Gennaro is one of the underground burial sites in Naples. Janne and visited this on a tour, and were surprised.
Years ago, we had visited the Paris catacombs that were indeed a burial site, with many of the bones still remaining in the tunnels. The Naples catacombs surprised us in that they were much more than that.
Yes, there were graves. But there were also several chapels, places of worship, and paintings. Much more church-like, building-like and not as cave-like as in Paris.
The graves were also individual, selected positions rather than mass collection of bones.
Halls and chapels: