6.8 Mill. bats leaving the Pha Yaa cave

The Pha Yaa cave in Loei Province is certainly a must to see, and definitely one the winged man of steel would be impressed with!
Within Phu Pha Lom Forest Park, in Na Duang District, Pha Yaa Cave is the natural habitat of countless (experts counted about 6.8 Mill) insectivorous bats. They live in an abundant area and are critical to the terrestrial ecosystem by bringing balance to nature.
Around 6.30pm, seen exiting from the mouth of the cave in the mountainside, a flock of literally millions of bats starts their procession to forage together in the Park. The flock creates a dark beautiful winding line drawn across the dusky sky until the sun sets. Lasting about an hour until the last one has left the cave, their sound breaks the silence of the early evening, yet retains a peaceful atmosphere. Simply amazing!

The bats return before dawn in a similar fashion.