I want to know the answer to the following question:
Where can view the network of tunnels to the catacombs?
All the background I'm provided with is that "The process of moving bones from Cimetière des Innocents to the catacombs took place between 1786 and 1814; part of the network of tunnels and remains can be visited today on the official tour of the catacombs.". Is that enough to answer the question?