KMZ files are also available to view maps in greater detail in Google Earth (and many other mapping programs). Download the KMZ zip file, then double-click it to extract the KMZ files and save to your computer. Open the Google Earth program. [ If you don’t already have Google Earth, you can download and install it for free HERE. ] Drag the KMZ file onto the Google Earth program icon or main screen (or in Google Earth, click File, Import and select the KMZ file). After the KMZ file loads, you can zoom way in for more detail, change the angle of view, show or hide layers, and adjust transparency of layers.