[masraum]

Originally Posted by GH85Carrera

Veryovkina Cave, located in Abkhazia, holds the record as the world's deepest cave, plunging to a depth of 2,212 meters. Discovered in 1968, it took decades of relentless exploration to reach this milestone. In 2017, Russian speleologists finally achieved this record depth after numerous expeditions.

That's nearly 1.5 miles of vertical (on top of all of the other stuff required to get there. I assume it's a multi-day journey. Crazy! I wonder what the climate is like on the way down and at the bottom!

And how do you measure the depth reliably and accurately that far underground? It's not like you can use GPS.