What if I told you Superman’s crystal fortress is real exist would you believe me? ofcourse you wont believe,But when you go Deep under Iceland’s massive Vatnajökull Glacier, beautiful caves of ice which are formed by rivers of meltwater you would see for yourself.
its too dangerous to visit in the spring and summer due to a threat of collapse, cold winter temperatures strengthen the ice and make exploration possible so i wont suggest you go there during this period of time.

Source: http://www.muzikii.com/2017/05/ice-cave-in-iceland.html

there are too many magic ice caves in Iceland and if you get a chance to be in any on of them you'll explore the blue ice of a massive glacier. It is something very special to stay inside an ice cave and be surrounded by crystal clear blue ice. The natural ice caves are only accessible during the winter but the ice tunnel can be visited all year.

Source: http://www.muzikii.com/2017/05/ice-cave-in-iceland.html

See me in the middle