Through the Google Earth Blog I’ve learned about some virtual submarine tours created in Google Earth. Sea-Seek has created six virtual submarine tours of sites including the Mariana Trench and the Strait of Gibraltar. These tours operate in your browser using the Google Earth browser plug-in. To view the tours visit the Sea-Seek homepage where you will find the tours in the lower-right hand corner of the page.
If you don’t have the Google Earth browser plug-in, you can get it here. After installing the Google Earth browser plug-in you can view some of Google’s featured tours including a Mars exploration.
Here are some related resources that may be of interest to you:
Google Earth Tours and DIY Google Earth Tours
Google Earth and Google Maps Help
Google Earth Links You Might Have Missed