Google added Santiago and Valparaiso in Chile South American cities in to Google Building Maker. Now everyone can help model these two cities with Google Building Maker. "Google Building Maker is our simple 3D modeling tool that allows you to construct buildings by aligning various types of blocks to photos - all from your Internet browser. The completed models are automatically geo-located and then reviewed for inclusion in the 3D Buildings layer on Google Earth."
Click here to start, and get your models on the 3D map!