Google Earth can display a LOT of great information in the 3D viewer. Roads, placemarks, borders, parks, 3D buildings, train stations and much, much more. In fact, your view of an area can be so full of information that things can become cluttered and difficult to visually parse. Fortunately, Google Earth allows you to hide or display information. There are two ways to do this:
Places Panel - You can hide or display individual placemarks or entire folders by checking or unchecking these in the Places panel. Of course, you can also hide all placemark information by unchecking the top level folder (My Places). Learn more about using placemarks.
Layers Panel - Similarly, you can hide entire categories of information by checking or unchecking items and folders in the Layers panel. For example, if you want to view the natural terrain of an area, but not street information, uncheck Roads. Learn more about layers.