WAKAYAMA—A rare event to explore the underwater world of Wakayama Castle’s moat took place here on Oct. 5 as volunteers and city officials lowered the water level, revealing a hidden ecosystem.

Fatima and Harry find out about the main features of a castle - including the moat, drawbridge, battlements, thick walls, towers, etc. Fatima: So I've seen lots of castles in books and on the ...