Jan Tilden: lichen
Jan Tilden: symmetria
Jan Tilden: ice peak
Jan Tilden: "veins" in an epiphytic fern
Jan Tilden: drops
Jan Tilden: drinking
Jan Tilden: bubbles
Jan Tilden: spiral
Jan Tilden: turbulence
Jan Tilden: sequentially cracked rock
Jan Tilden: simultaneously cracked rock
Jan Tilden: drops on red leaf