ナショナルジオグラフィックのインスタグラム(natgeo) - 2月24日 15時26分

Photo by @shonephoto (Robbie Shone) - This is the view looking straight down into Titan shaft, inside a cave known for centuries as The Devil’s Arse (Peak Cavern), England. Carved out by water, these limestone cliffs measure 141.5 metres (464 ft) high, making Titan the biggest cave in the UK. It is even tall enough to swallow the London Eye.
In the 1770’s when nearby miners mined lead ore from inside Speedwell Cavern, they must have passed below Titans great boulder pile, unaware of what giant void lay directly above them. It wasn't until on New Years Day, 1999 when Titan was discovered by local cave explorers, and it’s entire splendour was illuminated for the very first time, having been formed and sculptured in total darkness over a very long period.

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