A brick in one of the plazas in my town….really makes me wonder who put it there and why.
Just a pool, disguised as a pond, with a trampoline instead of a diving board.
I wrote a paper about these kinds of pools several years ago for a class when they were just prototypes. These pools have a natural filtration system that run based on the plants that are in the pool that give the water nutrients that allow it to not only be crystal clear, but you are also able to drink the water because it becomes so clean. And the best part is that once the initial filtration system is installed and calibrated, it maintains itself and eliminates the need for chlorine or constant maintenance like salt water pools.
Approximately 1,200 miles off the southeast coast of Africa lies an island nation known as Mauritius that gives off the illusion of an underwater waterfall at the southwestern tip of the island. The visually deceiving impression, created in the water due to the runoff of sand and silt deposits, is especially effective and breathtaking in aerial shots. In fact, the illusion can even be seen on Google Maps.