System for moving objects on a closed path

System (1) for moving objects or elements (100) defined by objects or elements representing people, things or animals, on a closed path, said system comprising a fixed annular body (2) suitable to support a structure (3) carrying said elements (100) in a movable and guided manner, said fixed body (2) and said movable structure (3) each comprising a plurality of portions (10, 25K,W) constrained to each other, said portions being modularly assemblable, the elements (100) supported by the movable structure being removably associated with said movable structure (3), the portions (25K,W) of the movable structure (3) comprising at least one side (29A, 29B) provided with a succession of coupling elements (32, 33) suitable to cooperate with at least one toothed gear (46, 47) of movement actuator means (4) which move said movable structure (3) on the fixed body (2), characterised in that said at least one toothed gear (46, 47) comprises a pair of toothed portions (55, 56) with different diameter and superimposed with respect to each other, a first toothed portion (55) cooperating with drive means (50, 51) of said movement actuator means (4) and the second toothed portion (56) cooperating with said coupling elements (32, 33) of said movable structure (3), said movement actuator means (4) being associated with a containment body (5) integrally joined with the fixed body (2) of the structure (1).