Artists like to see textures.
What kinds textures can you see?
You can touch and feel textures, too.
“Circium discolor 2, Field with white tomentose leaf Howard County, Md, HLM_2019-03-22-18.04.59 ZS PMax UDR_1” by Sam Droege is marked with Public Domain Mark 1.0.

“Feather” by Kim Siever is marked with Public Domain Mark 1.0.