Zion National Park, Utah
Zion has been hyped by the Americans and it didn't dissapoint. It is one of the few places that Americans are forced to leave their monster cars in car parks and use a free shuttle to get around.
The free shuttle has a happy slappy feel to it. The usual on the left you will see this and these sandstone mountains are the largest in the world type commentary info.
Zion is also the first park (maybe Bryce also) where you feel that you need to hike to see the park ...