Upside-down world

From Spaceweather.com:

The next time you walk by an icicle, pause and look through the tip. There's an upside-down world inside:


"The water droplet at the tip of the icicle acts as a convex lens, forming an inverted and reversed image of objects beyond," explains photographer Lois Reinart of Tracy, Minnesota. "On a warm winter day with lots of sunshine, the view within those icicle droplets can be quite delightful." more images: #1, #2, #3, #4."