+1 to Ian's dream - but the bike might have a motor.
![Whistle :whistle: :whistle:](/styles/default/xenforo/smls/whistling.gif)
And I'd include Las Vegas to do the Hoover Dam and Mojave, then a couple of stops to visit friends in Phoenix and Tucson... yeah, ok, we can dream can't we.
A lap of Iceland could be fun and unusual. A tour in Norway / Sweden / Finland / Denmark would be more likely.
Coincidentally, I was talking with a colleague just yesterday and he mentioned that his neighbour is doing a lap of the UK this summer. He's planning on 6 weeks to do it as it's around 4k miles, depending on the route chosen, of course.