Underground Paris (France) is the 321 km long network of old caves, tunnels, stone mines, the main tomb area full of bones and skulls.
The origin of this creepy tomb began two centuries ago. In 1786, dead people who was buried in the cemetery of Paris and the church became overloaded. The dead which were usually buried near residential areas seriously affected people's health.
After that, they found the solution was to move all the entire remains of the dead to the stone mines underground. This space was the perfect solution to ease the overloading in the cemetery, but it also showed many disadvantages such as the risk of land subsidence. That is why there are few tall buildings in Paris, the great foundations can not be built because the tomb is beneath the streets.
One of the museum's surveillance, Tram Nguyen, talk about common reactions of people in the tour: "When coming here for the first time, you are quite impatient, but then will get used to it. Sometimes you do not recognize the bones as the remains are not human anymore, but just think of them as a form of decoration. "
Most of the remaining underground areas are prohibited to be violate. Any violation can be fined up to 60 Euro, but it stimulated strongly people who prefer exploring, discovering.
Street names are etched into the walls to help explorers to adjust their direction underground. Some groups even organize party and drink in the tunnel.