"access"=>"yes","fee"=>"no","parking"=>"surface","surface"=>"sand"
"fee"=>"no","surface"=>"unpaved","capacity"=>"50"
"fee"=>"no","access"=>"yes","parking"=>"surface","surface"=>"ground","supervised"=>"no","opening_hours"=>"sunrise-sunset"
"access"=>"yes","fee"=>"no","opening_hours"=>"sunrise-sunset","surface"=>"compacted"