A few nice nature image images I found:
Nature's Firework
Image by fs999
Pentax K-7 • Tamron SP 90mm f:2.8 Di Macro
TopazLabs DeNoise5
Tiger shark & brave women
Image by Iggy.
This is a compelling image...the apparent serenity of the scene masking the potential for complete mayhem. This species of shark is a known man eater.
