When you have some great examples here on earth. An invite to post your examples (or links to it) here.
I'll start with a few from a recent trip to a National Park here in Western Australia.
http://www.pbase.com/image/27871884
http://www.pbase.com/image/27873097
http://www.pbase.com/image/27873098
http://www.pbase.com/image/27873099
http://www.pbase.com/image/27873100
http://www.pbase.com/image/27873101
Cheers,
Marcel