https://weather.com/news/trending/video ... -catacombs
These two teens were taken to hospital and treated for hypothermia.
It is said that the bones of six million people are buried in these catacombs, which are a maze of tunnels.
Here is a BBC story about the Parisian Catacombs.
http://www.bbc.com/travel/story/2012102 ... -catacombs
Barbara, have you seen these catacombs?