Here is an initial sketch for a stone effect pillar for a guards gate set.
Possibly built from layered sheets of plastazote the intention is for it to be light, stackable and as safe as possible should anyone fall onto it during use.
The recess and flat top surface would allow for removable led lanterns or glow sticks to sit on it.
The base would fix to the ground to try & prevent it blowing away during windy events. This would need covering with foam rubble and artificial greenery to allow it to blend in.