International Space Station.
Damn Dfor you beat me to it! Definitely would go into space.
Although... technically that wouldn't be 'in the world'. If I was restricted to 'terra firma' it would be a really tough choice and part of the deal would be 'does the 7 days include travel time?' Also what time of year, etc. If we're talking February and I'm in a serious partying mood... Hey Mon... see you in Jamaica mon!
Maybe we could split the trip and go halfway. no wait that wont work. ok we can go for 3 1/2 days.
I would go to Europe somewhere.
I'd love to go back to Burmuda again.