The easiest way is seeing your rute you've made on your Nuvi on the Google Earth. Too bad that my Nuvi has no capability to talk with Google Earth; so the option to combine the Nuvi data is doing by manually.
First fireup your Nuvi and connect to your computer. Fireup also your Google Earth programmed. After succesfully acces the Google Earth server drag a file with the extension .GPX from your Nuvi to the Places Folder.
Soon will be created a place called GPS Device consisting waypoint, tracks and routes.
Now you will see the tracks on the Google earth screen and sure also with some waypoint from your favorites.
Very interesting and nice.
So if you wanna see where your mate have been going you could grab his GPS and load the .gpx to your google earth, and you'll see where the place he's been visiting.....

