Phong nha-ke b**g national park 🌿 -unseco world heritage site that contains the oldest karst mountains in asia, formed approximately 400 millions years ago. riddled with hundreds of cave systems and spectacular underground rivers ⛰🛶
so, one my friend asked to post here some my photo but 5 years ago. so here i am.
5 years ago in the end of winter i was in scientific expedition in #karpatian caves we had monitored the quntaty of bats.
then there was my article and photo in ukrainian #natgeo.