A friend sent me a link to this great photo site [Gateway to Astronaut Photography of Earth] that hosts a ton of photos taken by astronauts.

The Gateway to Astronaut Photography of Earth hosts the best and most complete online collection of astronaut photographs of the Earth.

Beginning with the Mercury missions in the early 1960s, astronauts have taken photographs of the Earth. Our database tracks the locations, supporting data, and digital images for these photographs. We process images coming down from the Space Shuttle and International Space Station on a daily basis and add them to the more than 482,014 (count updated monthly) views of the Earth already made accessible on our website, 98,630 of which are taken from the International Space Station (updated 10/20/2003, metadata in progress).

-Chris