Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Hydrosphere (Earth) - layer of water
                                   (Drainage basin) Atlantic Ocean Basin
                                     (Drainage basin) American Mediterranean Sea Basin (America)
                                       (Drainage basin) Gulf of Mexico Basin
                                         (Drainage basin) Mobile Bay Basin (United States)
                                           1.302634N0880033W (Bay) Mobile Bay (United States: Alabama: Mobile County)
                                           2.1a.304107N0880025W (Stream) Tensaw River (United States: Alabama: Baldwin County)
                                           2.1b.303922N0880152W (Stream) Mobile River (United States: Alabama: Mobile County)
                                           2.2.1.310810N0875636W (Stream) Alabama River (United States: Alabama)
                                           2.2.2.321909N0870541W (Stream) Cahaba River (United States: Alabama)
                                           2.2.3.323009N0861548W (Stream) Tallapoosa River (United States: Alabama: Elmore County)
                                           2.2.4.1.322910N0861640W (Stream) Coosa River (United States: Alabama: Elmore County)
                                           2.2.4.2.341514N0851036W (Stream) Etowah River (United States: Georgia: Floyd County)
                                           2.2.4.3.1.341514N0851036W (Stream) Oostanaula River (United States: Georgia: Floyd County)
                                           2.2.4.3.2.343237N0845410W (Stream) Coosawattee River (United States: Georgia: Gordon County)
                                           2.2.4.3.3.343237N0845410W (Stream) Conasauga River (United States: Georgia: Gordon County)
                                           2.3.310811N0875639W (Stream) Tombigbee River (United States: Alabama: Washington County)