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) Biosphere (Earth) - zone of life
                                   "geopolitical regions"
                                     (Region) World
                                       (Region) Americas
                                         (Region) North America
                                           (Country) United States (1776-present)
                                             (Region) South (United States)
                                               (Division) South Atlantic (United States)
                                                 (State) Maryland (United States)
                                                   (County) Allegany County (Maryland)
                                                   (County) Anne Arundel County (Maryland)
                                                   (Division) Baltimore City (Maryland)
                                                   (County) Baltimore County (Maryland)
                                                   (County) Calvert County (Maryland)
                                                   (County) Caroline County (Maryland)
                                                   (County) Carroll County (Maryland)
                                                   (County) Cecil County (Maryland)
                                                   (County) Charles County (Maryland)
                                                   (County) Dorchester County (Maryland)
                                                   (County) Frederick County (Maryland)
                                                   (County) Garrett County (Maryland)
                                                   (County) Harford County (Maryland)
                                                   (County) Howard County (Maryland)
                                                   (County) Kent County (Maryland)
                                                   (County) Montgomery County (Maryland)
                                                   (County) Prince George's County (Maryland)
                                                   (County) Queen Anne's County (Maryland)
                                                   (County) Somerset County (Maryland)
                                                   (County) St. Mary's County (Maryland)
                                                   (County) Talbot County (Maryland)
                                                   (County) Washington County (Maryland)
                                                   (County) Wicomico County (Maryland)
                                                   (County) Worcester County (Maryland)