It looks like it's not very high up, doesn't it? That's because it's not.
We've been only to low Earth orbit since 1972, and from that altitude of 220 miles, looking at the Earth is like peering at a basketball with your cheek pressed against it. We've spent 32 years "exploring space" in low Earth orbit. Exploring nothing.
Update: Probably not actually from ISS, possibly from a high flying plane, but nobody has yet pointed to the actual source of these photos.
We're still peering at the basketball, though.
Update 2: Possible source. WB-57 chase plane.