When you explore the world by using Panoramio's map or Google Earth, you want to see the best photos of a place first! That's why the most popular photos are visible at higher zoom levels. You'll see the other photos as you zoom into a location, with the least popular photos appearing only at the lowest zoom levels.
The popularity rating of a photo is determined by a combination of over 20 variables. These include...
However, we don't disclose the exact popularity formula to avoid encouraging attempts at popularity manipulation. The best way to make your photos visible is to upload great shots!