What's Your Ultimate Challenge?

[maxingout]

For nearly my entire adult life, I have wanted to do two things. The first was to sail around the world on a multihull, and the second was to drive around the world in a Land Rover truck. I did the circumnavigation on my catamaran, Exit Only, but as yet I haven't made the driving trip around the world. I have two expeditionary equipped Land Rovers ready to go, but I am in a holding pattern for the time being earning more Freedom Chips.

I regard these two goals as my ultimate challenges. They aren't extreme goals. They're more about desire, persistence, and hard work. I don't have any extreme goals like people who do extreme sports. I feel no attraction to the extreme.

So here is the question. Setting aside the extreme and focusing on the possible, what is your ultimate challenge? If you put your mind to it and relentlessly worked on a dream, what would that dream be? What would you do with the rest of your life?