Google Ocean (http://earth.google.com/ocean/), which is included in the newest download version of Google Earth, allows users to explore the high seas with thousands of images of underwater landscapes from volcanoes to sea life.

Users can also watch videos, read stories and contribute photos as they explore the ocean.

Google Earth, which combines satellite photos, maps and information to enable users to explore streets and cities around the world, has been downloaded 500 million times since it was introduced in 2005.