Weird or What?
In British Columbia, Canada, there is a small lake that is described as a "Medicine Lake " due the various coloured ponds whithin the lake. These ponds are formed when the very high amount of disolved salts precipitate out of solution and deposite on the bottom of the pond.
Many famers present some sort of art in their yards and fields. Personally, while driving the backroads of Alberta, Canada, I have seen many of these and they are all different and usually make me laugh.
Molusks that attach to limestone to suck out nutrients to survive. They do not look like they are alive just the same!