Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Open Spaces and Site Elements (hierarchy name )

Narrower term/s

• [open spaces by location or context][+]
  • lots (land) [+]
    • vacant lots
  • agoras
  • city blocks [+]
    • superblocks
  • commons (open spaces)
  • forums (open spaces)
  • greens (open spaces)
  • grounds (open spaces) [+]
    • parks (grounds) [+]
      • pleasure parks
      • hunting parks
  • overlooks
  • parvises
  • greenbelts
  • yards (open spaces) [+]
    • farmyards
    • barnyards
    • dooryards
    • carpenters' yards
  • [waterfronts and waterfront spaces] [+]
    • waterfronts [+]
      • lakefronts
      • riverfronts
    • waterfront spaces [+]
      • berths (waterfront spaces)
      • slips (waterfront spaces)
      • docks (waterfront spaces)
  • greenways
  • esplanades (fortifications grounds) [NP]
• [open spaces by function][+]
  • dumps (refuse areas) [+]
    • spoil banks
    • junkyards [+]
      • automobile graveyards
    • landfills [+]
      • sanitary landfills
    • slag heaps
    • middens (dumps) [+]
      • shell middens
  • stockyards
  • musallas
  • nature reserves [+]
    • wilderness areas
    • wildlife refuges [+]
      • bird sanctuaries
      • marine sanctuaries
    • forest reserves [+]
      • national forests
      • state forests
    • Indigenous Protected Areas
    • geoparks
  • parks (public recreation areas) [+]
    • [parks by location or context] [+]
      • neighborhood parks
      • regional parks
      • urban parks
      • vest-pocket parks
      • marine parks
      • community parks
      • art parks
      • archaeological parks
      • cultural parks
      • geoparks [NP]
      • historical parks
      • military parks
      • battlefield parks
      • country parks
    • [parks by ownership or administration] [+]
      • national parks
      • state parks
      • provincial parks
      • public parks
      • tribal parks
  • walkways [+]
    • crosswalks [NP]
    • sidewalks [NP]
    • pedestrian malls
    • garden walks
    • paths [+]
      • trails (recreation areas) [NP] [+]
      • bridle paths
      • bicycle paths
      • footpaths
      • towpaths
    • promenades (walkways) [+]
      • alamedas
    • skywalks
    • covered walkways [+]
      • lang
    • allées
    • boardwalks
    • timber trackways
    • raised walkways
    • cuttunāḍī
    • esplanades (open spaces, general)
  • [sports and recreation spaces] [+]
    • recreation areas [NP] [+]
      • dude ranches
      • amusement parks [+]
      • midways
      • camps (recreation areas) [+]
      • resorts [+]
      • preserves [+]
      • sports complexes (building complex) [+]
      • trails (recreation areas) [+]
      • campgrounds
      • parks (public recreation areas) [NP] [+]
      • bathing beaches
      • club complexes [+]
    • bowling greens
    • golf courses [+]
      • miniature golf courses
    • running tracks
    • camp sites (recreation spaces)
    • fairgrounds
    • picnic areas
    • playgrounds [+]
      • adventure playgrounds
      • neighborhood playgrounds
      • tot lots
      • schoolyards
    • riding rings
    • driving ranges
    • athletic fields [+]
      • baseball fields
      • softball fields
      • cricket fields
      • football fields
      • hockey fields (athletic fields)
      • lacrosse fields
      • polo fields
      • rugby fields
      • soccer fields
    • batting cages
  • transportation spaces [+]
    • roads [+]
      • [roads by form] [+]
      • [roads by function] [+]
      • [roads by design] [+]
      • [roads by location or context] [+]
      • [roads by material] [+]
    • motor vehicle lots [+]
      • used car lots
      • parking lots
    • air transportation spaces [+]
      • airfields
      • taxiways
      • runways (airport runways) [+]
      • overruns
      • helipads
    • routes [+]
      • trade routes
      • pilgrimage routes
      • cultural routes
      • portages (routes)
    • esplanades (open spaces, general) [NP]
  • parade grounds
  • sacred groves
  • public spaces
  • trackways (fossil foot prints)
  • protected areas
  • gallows fields
  • concession areas
  • maneuver areas
  • rookeries
  • wildlife crossings
• [open spaces by form][+]
  • gardens (open spaces) [+]
    • [gardens by form] [+]
      • formal gardens [+]
      • hanging gardens
      • rock gardens [+]
      • water gardens
      • walled gardens
      • landscape gardens
      • peat gardens
      • miniature gardens [+]
      • boskets
      • Chinese gardens
      • Japanese gardens [+]
      • Dutch gardens
      • terrace gardens
      • dry gardens [+]
      • vertical gardens
    • [gardens by function] [+]
      • botanical gardens [+]
      • kitchen gardens
      • market gardens
      • pleasure gardens
      • sculpture gardens
      • tea gardens
      • historic gardens
      • children's gardens
      • xeriscapes
      • healing gardens
      • enabling gardens
      • Zen gardens
      • memorial gardens
      • prayer gardens
      • indoor gardens
      • meditation gardens
    • [gardens by location or context] [+]
      • cloister gardens
      • roof gardens
      • giardini segreti
      • sunken gardens
    • [gardens by product] [+]
      • flower gardens [+]
      • herb gardens
      • vegetable gardens [+]
      • ferneries (greenhouses) [NP]
    • [gardens by ownership] [+]
      • community gardens [+]
      • private gardens [+]
      • public gardens
  • quadrangles (open spaces) [+]
    • teoithualco
  • squares (open spaces) [+]
    • plazas (squares) [+]
      • plazuelas (Maya architecture)
    • maydans
    • piazzas (squares)
  • kgotlas

Anotations

Scope note:

Spaces in urban environments designed as passages for pedestrians, and as social spaces, not as clearly delimited as parks, but sharing some of the same characteristics. Often these function as utilitarian connecting spaces between buildings, or simply as an open area designated by a municipal authority, but without the amenities or formality of a park.