Javier Fernandez-Sanguino
Google
The catacombs are an impressive specially the first catacombs. You will find an interpretation centre right when you buy the tickets and a 15 minutes video explaining the site.
The visit includes an audio guide, available in multiple languages and the site offers free WiFi throughout the visit.
The site has two areas, the main area, where the ticket shop, the main displays and the biggest catacomb is and a second area, right across the road, which holds smaller catacombs (but with distinct features) and the shop, right before the exit.