El Don Quijote:
A walk in the park
El Don Quijote:
Tree roots making a point
El Don Quijote:
tree-roots
El Don Quijote:
Micro-canyons
El Don Quijote:
Curved tree growth
El Don Quijote:
A tree's skin
El Don Quijote:
Tree tentacle
El Don Quijote:
Nature's mathematics at work