Go to top right of page named 'Download Map' and click on 'click here'. This will download the KMZ file to your computer. Now start up Google Earth and click on 'File' (top left) and then on 'Open'. Navigate to where you saved the KMZ file and open it. There's a hell of a lot of detail and at first looks mre like a Rockape and a yellow crayon have been combined! Just zoom in where you want to see.