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  OTTER HOLE, RIVER WYE (below Chepstow Race Course)



The pictures are some of the more than man-sized stalagmites in the Hall of the Thirty. The size, type and quality of these is exceptional for a UK cave. Note the glow in the bottom picture. These stalagmites are calcite, which often seems to be translucent. Refraction of the light of a flashbulb seems to continue after the flash - hence the glow effect.