Grand Canyon alone would be worth a trip to the US. It is just an amazing place on this globe.
I had been at Grand Canyon already twice, had walked down Bright Angel Trail to the campground. This time unfortunately we did not have a backcountry permit to stay down there over night. So we decided to hike Bright Angel Trail and South Kaibab Trail to the border of the inner rim. That leaves me with a new open target for the next time - hiking down South Kaibab Trail completely. I think this one is even more scenic than Bright Angel Trail.