The term 'Gladiators' Grounds' refers to an ARENA, which is a large, open-air venue used for public events such as sports, concerts, and theatrical performances. The term 'ARENA' comes from the Latin word for sand, as the original arenas were built with sand floors to absorb blood during gladiator fights. Gladiators' Grounds were popular in Ancient Rome, where they served as a place for gladiators to fight and entertain the public.