Fire Diem Son, where appeared in the work
Changes in weather, earthquakes, the effects of nature ... over a long period of time have created wonderful natural caves in the world that amaze people.
With the continuous weathering of thousands of years of wind, water, rain ... the emerald green caves below bring the beauty that makes you feel
Crystal Cave in Mexico, located 160m deep underground, where there are CaSO4 crystal columns as high as 10-11m is in danger of disappearing due to climate change.