Did this twice, forgot the years - but definitely one of my favorite nature spots on Earth - there is a little of everything here - from rocks to water to great hiking and vegetation - and great food at the cafeteria :) Great for a day or two trip from Vegas!
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe