Check out this company. They offer the ability to fly a Mig29 to the edge of space to 70,000'. You can see the curvature of the earth, just in case you still think the earth is flat. They have some other great adventures you might want to put on your life list too.
I have spent most of my adult life trying to live life great. No regrets. If I see or hear of a great adventure, I book it and do it.