It’s big enough to swallow cities, deep enough to hide skyscrapers and inside lies an ancient, thriving ‘lost world’ cut off from everything above
Looking down on it from above, the world’s deepest sinkhole, Xiaozhai Tiankeng, seems to be as if somebody used an huge apple corer to gauge a bit out of the earth’s core. Steep sides give approach to a deep, darkish abyss, shaded in mist and thriller. In China’s Chongqing Municipality, locals have identified in regards…