This is meant to show a map of the Retro Ride route, generated by Map My Run, a cunning web based device that seems to piggyback on Google Earth.
Unfortunately the embed code generated by their site does not work, but regardless, it's a very cool thing for mapping out routes.
In the absence of a functional embed code, here's the link .
Use the Map Settings to the left to turn off the annoying Distance Markers.
'Display Elevation' produces a course profile, while 'Map Type' allows you to switch from a street map to various Googloid satellite views.