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) "surface" (Earth)
                                   (Continent) Americas
                                     (Continent) North America
                                       (Mainland) North America
                                         1 "Alaska" (United States; mainland)
                                         2 "Canada" (North America; mainland)
                                         3 (Mountain Range) North American Cordillera (North America)
                                         4 "United States" (North America; mainland)
                                         5 "Mexico" (North America; mainland)
                                         6 (Peninsula) Yucatán Peninsula (Central America)
                                         7 "Panama" (North America; mainland)
                                         8.400000N0780000W (Mountain Range) Appalachian Mountains (Canada, United States)