Faller Planetarium 130939 & Garden Maze Diorama
Some parts, such as the dome, come pre-"weathered".
I searched the internet and discovered that there's a 3D Planetarium show called "Dawn of the Space Age",
so I downloaded and resized some related graphics.
The hedges are by Faller (#181489).
The pond is made from pieces in Busch's Garden Pond Set (#1210) - the bench is also by Busch (#6012).
The hedge around the Planetarium is the same as that used for the Maze, but cut in half.
The trees are from Hong Kong (search for NS85B on eBay).