If you loved Google street view your going to love the new partnership that allows Google to grab/use images from another company's underwater "mapping" endeavors! You can now dive into shallow waters and see incredible fish and scenery just like you'd use street view!
This definitely adds a layer to the realm, rather the documenting of our realm. You're no longer limited to streets, roads, or sidewalks, now you can take a journey through some stunning panoramic images from "under the sea". You may just see a mermaid... ya think?