The High Tatras is a small mountain range that hugs the border of Slovakia and Poland.
Recently, some climbers stumbled upon this crystal-clear frozen lake during their wintry journey.
Needless to say, the scenery is remarkable.
After stepping onto the ice, they soon realized that it was translucent; they could see all the way to the bottom of the ultramarine mountain lake.
To get a true feeling of what it was like to be there, check out the video above.