Kitkat16 wins with the first closest guess at 4700km.
Correct answer: Manila, Asia
Next:
The brown building is a big hint.
I swear on my honour that I guessed India without right clicking, but after I posted I right clicked to see if I was right, and it said it was a picture of Mumbai (which is in India.) I would not have been able to get the specific city though.
As for the other pictures, other than the Washington monument I wouldn't know where any of them were. The latest aqua blue one looks like Asia.