Also on these boards
Grand Canyon, Nevada. Can't wait for the kids to get older so we can hike. I don't remember going as a kid, but apparently we did! I do remember going in my early 20's and most especially for our 10 year anniversary taking a helicopter to the bottom for a champagne lunch. Goes down as one of the most amazing adventures of my life.
Havasu Falls, Havasupai Reservation, Grand Canyon National Park, Arizona, United States. I hiked down to these falls (11 miles from parking lot), and it was every bit worth it! You need to plan on camping out a few days. It's too much to do in a short period of time.