This is something that completely blew me away.
For anyone who hasn’t seen this yet, Google Street View is an extra layer in Google Earth that shows you eye-level panoramic photographs by a click from the regular Google Earth aerial picture. Click on a camera icon in that are lined up along the roads and you zoom in to a 360° panorama photographed at street level. You can also get there by looking for an address in Google Maps and then clicking on the “Street View” link.
I went on a nostalgic trip to visit various places I have lived in (like the above, which is the house I grew up in for the first 18 years of my life) and walked routes along streets just like I did 20 or 30 years ago. Just totally amazing.