I used one of the new Indiana Jones play sets as a model for this for this Indiana Jones cake.
The cake is iced in buttercream. The back wall is a cake board covered in foil and iced to look somewhat like a stone wall. The Indiana Jones figure is from the play set. The tree is made out of PVC pipe and iced in buttercream.
The skulls are just plastic skulls, I tried making some but they didn’t turn out the way I wanted them to so I used the plastic ones instead.