Ice caves or glacier caves are dangerously beautiful natural formations that contains significant amount of perennial ice. Which means a portion of the cave must have below 0 °C (32 °F) all year round, and water must have traveled into the cave’s cold zone. So to be able to witness this natural phenomenon, one must travel through icefields in unimaginable cold conditions to reach such remote places.

Picture above is Michael Anderson's ethereal photo of an ice cavern at the base of the Mons icefield in Canada taken in 2003. Incredible isn't it? See more photos of ice caves in Antartica, Alaska and Iceland below!