If you look at an ice cube halfway through the freezing process, when its core is still liquid, it will likely look crystal-clear. “Crystal-clear” is an apt term because at this stage ...

Within Breidamerkurjökull exist special ice caves ... Some caves sit closer to the glacier’s surface than others, and when light shines through their blue “crystal” ceilings it can look ...

An Alaskan couple could be seen gliding over a surreal crystal clear “ice window” that formed over a lake during a once-in-a-lifetime experience. Luc Mehl and Sarah Mehl Himstad were skating ...