Usage patterns
〈場所〉の周りに堀を巡らすto encircle a place with a moat or canal
They dug a deep moat around the castle.
堀を渡るto cross a moat or canal
We crossed the moat using a bridge.
堀に船を浮かべるto float a boat on a canal or moat
Tourists float small boats on the canal for sightseeing.