I just can't help myself. I am having too much fun playing virtual tourist with the Panoramio layer in Google Earth. If you are not familiar with this feature, be sure to check it out.
Simply navigate to a favorite destination (say Venice, Italy). In the Layers panel, check Geographic Web > Panoramio. Just start clicking the icons in the 3D viewer:
The location of each icon represents where the photo was taken. I've used this layer to scope out potential summer vacation destinations with my family. Since I've begun to use it, I've noticed that the number of photos in this layer have grown tremendously, so it is worth it to check this layer frequently.