Butterflies In The Amazon - This (along with so many innumerable reasons) is why the rain forests are so important. We are destroying so much of our world that we could lose things like this in our lifetime. That's too fast for the Earth to compensate.
Sandboarding.The most frequently visited sandboarding destinations in the world tend to be located in or around deserts and beaches, but there are plenty of other locations. Check out http://dsc.discovery.com/adventure/the-worlds-best-sandboarding-spots.html