Bit of constructive criticism:
1) My first reaction was to attempt to click on the image to go to the source or see the enlarged original. I find that clicking on the image doesn't do anything at all.
2) "Show Map" works fine if what you're searching for is around you, but as it is, I just got a map zoomed on my location and there's nothing at all to see or look at.
3) Scrolling is choppy (Google Chrome) for me. Particularly when a new background image is being loaded. Maybe provide an option to turn off the background image for those who experience the same or want a slightly cleaner look?
Cool job though. I've bookmarked it for when I'm looking for visual stimulation for ideas.