- - Zoo trenches
- - Zoo security features
- - Some zoo barriers
- - Zoo barriers
- - Zoo dividers
- - Zoo confines sometimes
- - Zoo features
- - Circular defense mechanisms
- - castle surrounds
- - They're found around castles
- - Castle safeguards
- - fluid obstacles
- - Strategic bodies of water
- - They surround many castles
- - Ditches around forts built as a defense
- - ditches below drawbridges
- - Castle water barriers
- - Protective ditches
- - Defensive water-filled ditches
- - Defensive castle ditches
- - Channels used to protect castles
- - Castles' defensive trenches
- - Castle protectors
- - Castle defenses
- - Castle surrounders
- - Castle rings
- - Castle barriers
- - Watery rings
- - Trenches
- - Defensive rings
- - Defensive perimeters
- - Defensive ditches
- - Castle encirclers
- - Defensive trenches
- - Deep defenses
- - Barriers at animal parks
- - Surrounding ditches
- - Castle ditches
- - Atoms smashed in defensive ditches
- - Rings of water around castles
- - Medieval barriers
- - Water-filled ditches as fortifications
- - Animal park barriers
- - Animal park rings
- - Certain Colonial-era protectors
- - Trenches in 42 Down
- - Watery castle ditches
- - Protective trenches
- - Castle trenches
- - Spots for drawbridges
- - Some castle defenses
- - Watery castle barriers
- - They're crossed by bridges
- - Drawbridges span them
- - Castle ringers
- - Tokyo Imperial Palace features
- - Things that drawbridges bridge
- - Castle-defending ditches
- - Siege deterrents
- - Rings around castles
- - Palace guards
- - Watery trenches under drawbridges
- - Palace protectors
- - Castle canals
- - Medieval security devices
- - Encirclers of castles
- - Perimeter defenses
- - Ditches around castles
- - Phony respect
- - Medieval defenses
- - Castle fortifications
- - Obstacles for marauders
- - Protective waterworks
- - Castle buffers
- - Features of many modern zoos
- - Deep ditches
- - Castles' barriers
- - Wet ditches
- - Castle guards
- - Drawbridges cross them
- - Protective rings
- - Certain trenches
- - Kronborg Castle features
- - Canals for castles
- - Watery fences?
- - Fosses
- - Fortress ditches
- - Defense ditches
- - Castle features
- - Ditches for ducal domains
- - Protections for princely palaces
- - Watery trenches
- - Castle visitors' hurdles
- - Castle areas
- - Certain ditches.
- - Certain fortifications.
- - Trenches around castles.
- - Protection for castles and towns.
- - Feudal barons' protection.
- - Fortress trenches
- - Water barriers
- - Ditches
- - Features of some zoos
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- [ Other definitions ]