I've been so many places, but it eventually came down to either the Grand Canyon or the view from the top of the Eiffel Tower, and I went with the Grand Canyon.
It was about a five-hour bus ride to get from Las Vegas to the Grand Canyon. Funny story: from the moment my parents told Kipstah and I that we were going to Vegas, they were adamant about how we weren't going to the Grand Canyon, which we were a bit frowny about, but didn't really mind because whatevz, Las Vegas was still frickin' awesome. Then, the morning of, we were woken up at four in the morning and told to start getting ready 'cause OH GUESS WHAT WE'RE GOING SURPRISE. Fact: coolest surprise ever. Also: most tiring surprise ever. I was a thoroughly sunburned zombie the next day.