Defensive rings
Else clues• Castle barriers
• Castle buffers
• Castle canals
• Castle defenders
• Castle ditches
• Castle encirclers
• Castle features
• Castle fortifications
• Castle guards
• Castle protectors
• Castle rings
• Castle surrounders
• Castle trenches
• Castle waters
• Castle-defending ditches
• Castles' defenses
• Deep ditches
• Defensive ditches
• Ditches around castles
• Drawbridges cross them
• Encirclers of castles
• Features of many modern zoos
• Fortress ditches
• Fosses
• Gator-infested waters, maybe
• Kronborg Castle features
• Medieval defenses
• Medieval security devices
• Obstacles for marauders
• Palace guards
• Palace protectors
• Perimeter defenses
• Protective rings
• Protective trenches
• Protective waterworks
• Ramparts' surroundings
• Rings around castles
• Rings around kings
• Siege deterrents
• They guard castles
• They were filled with alligators, supposedly
• They're crossed by bridges
• Things that drawbridges bridge
• Tokyo Imperial Palace features
• Water around castles
• Watery castle barriers
• Watery trenches
• Watery trenches under drawbridges
• Wet ditches
• Zoo barriers
• Zoo confines sometimes
• Zoo dividers
• Zoo features
• Zoo trenches