Welsh Hills Emit Mysterious Smoke From Underground Tunnels
Vapor plumes near sheepfolds in Eryri are from old railway tunnel ventilation shafts. Welsh Hills Emit Mysterious Smoke From Underground Tunnels Hikers see vapor near sheepfolds. It happens in Eryri mountains sometimes. These white plumes look strange. Some think they come from the Earth. Actually, the plumes are not natural. Dragons aren’t the cause either.…
