hidden cave within the himalayan depths, located in uttarakhand, india

cave himalayas uttarakhand india dark hidden mysterious nature adventure exploration subterranean mystical enigmatic spelunking geological formation passage interior cavern underground scenic landscape discover remote wilderness journey earth excursion depth geology wonder geologic spectacle intriguing natural phenomenon obscure subsurface underworld subterrestrial chasm subcave speleological speleology network intricate himalayan depths located india