I'm really not much of a picture taker, so I wont be using any pictures I have personally taken. I have tried to think back to all the cool pictures I have seen floating around and find the ones I found the most interesting.

 This is Strengite, I don't think there is much point in discussing the properties of this mineral, and I'm not a super earthy guy generally. However I love this picture because it looks like it was chipped right off the back of a dragon, or some sort of valuable ancient treasure. It looks like something right out of mythology, and it is the coolest mineral I have ever seen. There is unfortunately not a tremendous amount to be said about this, but I picked this specific picture of Strengite because it usually appears in light purple. Whether because of strange lighting or unique conditions of formation, this picture shows Strengite in a beautiful warm red, and it looks awesome.

This is a cool picture of a parrot in a tropical forest. I've always found birds interesting, and I find colorful birds especially cool looking. It amazes me that these birds have adapted these really bright vibrant colors as an evolutionary defense to hide from predators. The truly special thing about parrots, however, is the ability to speak without vocal cords by conditioning their trachea just so. If that wasn't cool enough, this parrot is extra special, because its not a parrot at all! Look very closely and see if you can tell, but I bet you can't. I'll give you a hint though, start at the tail. Do think it looks a little odd? Then move up from there. If you can see what I see, then you shouldn't have to ask why I think this picture is cool. I really do love parrots though.