Google Earth is a 3D graphics application enabling the viewing of aerial photography and satellite images to show views of the Earth from above in great detail. Google has taken the features Google Maps and merged it with the capabilities of Keyhole, and application built by a company acquired by Google in 2004. Google Earth enables the user to not only view these images, but also to view many layers of data provided by Google and by the Internet community at large. Such things as parks, rivers, roads, borders of countries, locations of national monuments and many thousands of other places.