If you have ever been to Japan/Tokyo you might have noticed that there are a lot of seemly random rocks about. One of my favourite instagram follows is urban__rocks who captures these on their walks.
I find this catalog fun and fascinating. At my house, we brought in a lot a rocks for retaining walls, but I couldn't help bring some urban__rocks closer to my house.
My rock, like the rocks in Tokyo, serves a specific purpose. This rock dissipates the water that drops from my hot water unit and its perfect.