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
                                   1.1 (Drainage basin) Arctic Ocean Basin
                                   1.2 (Drainage basin) Atlantic Ocean Basin
                                   2.1 (Drainage basin) Caspian Sea Basin
                                   2.2 (Drainage basin) Aral Sea Basin (Asia)
                                   2.3 (Drainage basin) Lake Balkhash Basin (Asia)
                                   2.4 (Drainage basin) Tarim Basin (Asia)
                                   2.5 (Drainage basin) Central Asian Internal Drainage Basin (Asia)
                                   2.6 (Drainage basin) Dead Sea Basin (Asia)
                                   3.1 (Drainage basin) Lake Chad Basin (Africa)
                                   3.2 (Drainage basin) Okavango River Basin (Africa)
                                   4 (Drainage basin) Indian Ocean Basin
                                   5 (Drainage basin) Lake Eyre Basin (Australia)
                                   6 (Drainage basin) Pacific Ocean Basin
                                   7 (Region) Great Basin (North America)
                                   8 (Drainage basin) Southern Ocean Basin
                                   9.1 (Lake) Lake Hodgson (Antarctica: Antarctic Peninsula)
                                   9.2 (Lake) Lake Ellsworth (Antarctica)
                                   9.3 (Lake) Lake Whillans (Antarctica)
                                   9.4 (Lake) Lake Vostok (Antarctica)