Near the southern tip of the park on the pathway towards the legislative building, there also exist two plaques affixed to boulders. The first boulder was installed in 1935, commemorating the silver jubilee of King George V; whereas the second boulder serves as a memorial for the victims of the Air India Flight 182 bombing in 1985. Another large boulder with a plaque affixed to it is situated northeast of the Mackenzie monument, and commemorates Canadian volunteers of the Mackenzie–Papineau Battalion. The battalion, which partly owes its namesake to William Lyon Mackenzie, fought during the Spanish Civil War as a part of the XV International Brigade.