Alaska-based artist Ryota Kajita took some amazing photos of natural ice formations in the waters of Fairbanks, Alaska. The alien-like structures are formed as rivers and lakes freeze from the surface down, trapping bubbles that formed in the water.
Check out Kaijta's series Ice Formations over at his website - via Brain Pickings
Above: Frozen Bubbles#2, Ice Formations (all images by the artist)
Frozen Bubbles#26, Ice Formations
Frozen Bubbles #27, Ice Formations