"A Vast Sinkhole Over 290 Meters Deep In Xuanen County, Hubei, China, Housing A Unique Ecosystem Of Ancient Trees, Plants, And Animals"
The Veryovkina Cave is a little bit deeper. Just a few metres: 2223metres.
But... Indeed... both caves belong to the same Arabika Massif. So, actually they are kind of neighbours.
#40 I remember when that guy was found. Amazing story.
Another great list, Iz. Thanks. Keep 'em coming.