Photosynth by Microsoft Labs
Photosynth allows travelers to share their photos in a way we have never seen before. This innovative photo sharing solution takes images and transforms them into a cinematic quality, 3D tour of the location. Getting started using this service is fairly simple and they even offer a downloadable video that will walk you through how to take overlapping photos, how to load your images and how to create a synth.
Currently they have quite a few travel destinations that synths have already been created for. To view them all you need to do is download the free Photosynth program to view and create synths. Feel free to post any synths you create below.