Mannahatta Project Map
Have you ever wondered what New York was like before it was a city? This Google Maps mashup uses custom made map tiles as overlays to show Manhattan Island and its native wildlife, as it would have looked in 1609.
The overlay's transparency can be adjusted. It is therefore possible to find your favourite New York places on the map and see how they might have looked in 1609. There is also a search facility so that users can quickly find New York landmarks and addresses.
The Mannahatta Project website also has a number of downloadable lesson plans about the project. The lessons emphasize science and social studies, and are ideal for learning across disciplines.