Pond fish normally only get to look up to see outside of their watery home, but this inventive DIYer created a unique viewing portal for his fish by inverting an aquarium above the water and filling it with water.
The upside-down tank works because of the physics of atmospheric pressure. You can create a mini version of this with a glass in a sink filled with water. We saw this video recently on CNET where it linked from Bored Panda. But this video has been around for a while, first making an appearance back in 2014.
Pretty cool and something both the fish and the video viewers seem to enjoy!