A number of people have asked about Google Lit Trips, possibly after one of our PD sessions. These take books that involve a journey, presenting that journey as an annotated tour in Google Earth.
A brief tutorial on adding placemarks to Google Earth is available at http://www.googletouring.com/create.php
Students might not initially see the ways in which placemark symbols can be changed This is useful as you can use one sort of placemark to mark say chapters and others to mark plot locations etc. When editing a placemark, click on the picture next to the Name , and a range of other icons will appear. You can also change colour etc of placemarks – this is reasonably obvious.