Lost Locales
I love stuff like this. The La Crosse (Wisconsin) Historical Society has developed an online exhibit entitled Downtown La Crosse: Then and Now. While there are only about 10 paired images that compare historic images with same-site photographs from more recent days, the side-by-side placements are particularly effective. The LCHS has also developed contextual notes and descriptions to accompany the photos, making the exhibit an excellent look at balancing history and progress.