Sepia Town is a neat website that allows you to view Google Maps Street View imagery side-by-side with historical imagery. Every image in the Sepia Town collection of historical imagery is geolocated on a Google Map. Click on any image then click on the “then/now” link to see the current Google Maps Street View image of the same location. The Street View comparison feature is only available for select cities. Learn more in the episode of Tekzilla Daily that is embedded below.

Applications for Education
Sepia Town provides a good way for students to compare current imagery with the past. Have students hypothesize and research why the scenes have changed over the years. You could also use this model to have student create past and present comparison layers in Google Earth.

Here are some related items that may be of interest to you:
Google Earth Across the Curriculum
Explore More Street View Imagery Than Ever Before
Exploring Climate Change in Google Earth