In case you haven't seen it, the ISS has added an live streaming orbital HD camera feed. You can watch a birds-eye view of the ISS circling the globe in about 90 minutes. Every 45 minutes you get to watch the sunrise or sunset, with the darkening terminator either fading away or marching inexorably towards you.
I recommend putting it on full-screen, HD and watching it roll on past.
It's a big planet.
As an added bonus, check out "The Long Swath", a 15 minute long, hypnotic pass filmed from the Landsat Data Continuity Mission, that runs from southern Russia, down through the Middle East, East Africa and into Southern Africa.