In this map you can see where the eighteen pictures of my thousand km photo project were taken. None of the inner red circles (with a radius of 500km) overlap, indicating that all pictures were taken at a distance of at least 1000km from all of the other pictures.
To help my project forward, I will need to visit places outside all of the larger (blue) circles (yes, they are circles! All of the strange shapes and differences in size on the map are due to distortions of the map itself: the circles would be true circles if seen on a globe).
Do you have a 1000 km photo project of your own? Comment on my blog post and I will mention your project on my site.