What to wear when visiting the catacombs
The temperature difference is what surprises summer visitors the most, and it’s often mentioned in reviews. Those arriving in a tank top after an hour in the sun at Capodimonte notice it by the second level.
Shoes
Closed-toe, with a sturdy sole: the ground is even but can be damp. At the Catacombs of San Gennaro, there are no steep descents and the route remains flat, but elsewhere the conditions change. At the Ipogeo dei Cristallini, you descend twelve metres on stairs with reduced lighting; in the Underground Naples of the historic centre, there are narrow passageways you have to sidestep through. I’ve listed the differences in which underground Naples to choose.
An extra layer
A light sweatshirt or a long-sleeved shirt is enough. It’s not a glacial cave: underground stays constantly cool while above it follows the season, and you feel the difference in the first five minutes. In winter, the situation reverses, and the underground temperature is milder than outside. I’ve written about how the seasons change in when to go.
What you don’t need
Torches, helmets, hiking boots: none of these. The tunnels are lit, and the visit is guided from start to finish. What you do need to know is that photography inside is not allowed, so your bag can stay light. If you have mobility needs, read first Accessibility.
Frequently asked questions
Is it cold inside the Catacombs of San Gennaro?
It’s cooler than on the surface, all year round. In summer, the difference is quite noticeable: bring a light layer to put on.
What shoes are needed for the visit?
Closed-toe, comfortable shoes. The San Gennaro route is almost entirely flat for about half a kilometre; elsewhere, there are stairs and narrow passages, as I explain in which underground Naples to choose.
Do I need to bring a torch?
No. The tunnels are lit, and you only enter accompanied by a guide. If you need easier access, you can find the information in Accessibility.