Simple categories matching unenclosed:

• structure,
• building,
• area,
• surface,

Members with property unenclosed:

• deck,
• patio_cover,
• porch,
• courtyard,
• cabana,
• gazebo,
• garden_center,
• picnic_shelter,
• shrubbery,
• noncommercial_stable,
• open_porch,
• construction_site,
• court,
• carport,
• balcony,
• open_carport,
• corral,
• appurtenant_facility,
• patio,
• under_bridge,
• attic,