Heather Knight and her Element Clay Studio have been seen on AT before with nature-inspired bowls. Like them, the Wall Tiles are made completely by hand out of porcelain clay. They feature a keyhole for hanging. Tiles are available in two sizes, but there's also work aplenty (bowls included) at her Etsy shop. And if geographical appropriateness matters to you, fungi and turf are pretty universal.
The full-sized tiles measure 9-inches square and 3-inches deep.
Hydrangea, full-sized for $180
Microtiles like Turf measure 5-inch square for $60
Who knew Fungi could look this good?