These stunning caves aren’t part of some fairy-tale world or horror movie – they can be found in some of the world’s most remote places in Asia, North America and Europe.
Some of these caves form when water seeps down through cracks in limestone rock. The limestone rock dissolves into the water bit by bit, forming cracks and openings. Over millions of years, these openings, and the limestone left behind by dripping water, can form the majestic caves you see here. Other caves were formed over millions of years by being gradually worn away by lake or sea water.
If you’re thinking of rushing off to visit one of these caves, hold your horses. Although some of the caves are open for public, like Phraya Nakhon Cave in Thailand, the majority of them are only open to extreme adventurers who have to get their passes in advance. As you can see from the pictures below, the people who get the chance to explore these natural beauties are equipped with some special equipment.
Fortunately for us, almost all expeditions to the caves are joined by professional photographers. Their precious photo shoots allow us to learn about those mysterious places on Earth that are still untouched by humankind.
source – Bored Panda