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Fabienne (urban caver) with mixed lights in an area known as the "Bar des Rats". Tikka LED lamps have a very blue light compared to the yellow candel tights.
Catacombs of Paris (off-limit area), about 20 meters (60 feet) underground, under Paris city center.
This is a part of the 200 Km network of ancient tunnels not opened to the public, but regularly visited by trespassing urban cavers called "cataphiles". See more information in the album description.