Another water drop image (earlier OPOD) by Marlyn Tows of Curitiba, Brazil. Rain has fallen on wooden decking.
The wood, probably waxed or varnished , is not wet by the water. The lingering drops are strongly convex. Convex mirrors in this configuration form inverted images (try it with some bent shiny plastic card) and we see upward growing branches apparently pointing downwards in the nearest drop.
There is refraction too. Drops are like miniature glass paperweights and strongly magnify the wood grain beneath.
©Marlyn Tows, shown with permission