very where you go under Paris, there is history and legend. s in their Historians and novelists often refer to the books. Victor Hugo mentions them in his famous novel Les Miserables, and the story and musical The Phantom of the Opera features a pond beneath the old opera house. Most people think it's a myth, but in fact there is an underground pond there with fish! Tourists can visit parts of the Paris underground like the catacombs beneath the Montparnasse district. Here you can see the bones and skeletons of about six million Parisians. The bodies came from cemeteries above the ground two centuries ago, when the city needed more space However, it's illegal to enter other parts of the underground, and police often search the area. It's also very dangerous because some of the tunnels might collapse. Nevertheless, there are people who will take you to visit them. I have found two unofficial tour guides-Dominique and Yopie (not their real names). They take me through many tunnels, and after a couple of hours we arrive at a room which isn't on any map. Yopie and some of his friends built it. It's comfortable and clean, with a table, chairs, and a bed. Yopie tells me there are many other places like this. "Many people come down here to party, some people to paint... We do what we want here.