Heavenly pit, world's deepest sinkhole in China

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image showing Heavenly pit, world's deepest sinkhole in China

L_S_D_M_T_N_T on October 28th, 2017 at 15:59 UTC »

That's a glorious hole

Track607 on October 28th, 2017 at 16:25 UTC »

Did you know that the hole's only natural enemy is the pile?

somersettler on October 28th, 2017 at 16:39 UTC »

When i was a kid i read a book about a guy/guys(??) on an expedition to Everest or similar, who found a place like this with a whole hidden civilisation living inside.

It was a huge fave but when i tried searching for it i failed. Anyone happen to know?

I think it was pretty old. Like written in the 50s or so

Edit: Solved! thanks /u/KingRodric it was The Lost World of Everest by Berkley Gray, https://www.goodreads.com/book/show/16085042-the-lost-world-of-everest