Step 1:
Click this link to download and install the free Google Earth software.

Step 2:
Go to the "Downloads" page for your choice of park and click the Google Earth link. When you are prompted, select "Open".

Step 3:
When the new window is opened, select "Extract all files" and when prompted click "Next" (you will have to do this twice)... Then when prompted, click "Finish".

Step 4:
When the new window opens, right click on the Google Earth file, hover over "Open With", and then click on "Google Earth". The file will automatically open in Google Earth and you will be taken to that park location.