Can you find the relationship between this picture:
And that one:
Well, the first one is a zoom on the steps of the Sacré Coeur basilica in Paris taken from the second picture. This is possible because the original picture comes from here. This is a 26 gigapixels stitched pictures (that is a picture made of more than 2300 pictures stitched together in software to make a 26,000 Megapixels single picture) that you can navigate from the site.
If you play with it you’ll also be able to see people at the top of the Eiffel tower, walking in the streets as well as if you’re really patient, 10 easter eggs hidden in the picture by the people that did it. (hint: http://diesellaws.com/the-10-easter-eggs-in-paris-26-gigapixels).