My sister and I went to the Valley Of Fire when we were in Vegas last year. Absolutely a cool place, but probably in the same way that people who live in Europe or elsewhere around the world think Niagara Falls is epic and worth spending a day in a plane to get here is worth it, but those of us who live in Ontario have become accustomed to and don't really think about much anymore.
As with any "epic" destination, if you spend enough time there, you become blind to the beauty. Live in a place like Banff long enough and the same thing would happen, while tourists flock and gawk, to the locals, it's just "home".
True, the only exception is if the attraction is seasonal.
Lots of Ontarioans still go up north to see the Fall Colours, and the Japanese love their annual Cherry Blossom festival every spring.