Sandcastle - Minas Tirith - Procedural Environment

I had to do a scene 3D only based on one word for a student exam. My word is sand, I thus decided to make a sandcastle to be able to create a beach scene. After some attempts, I realized that a usual sandcastle is too simple and it needed a little more difficulties, for this reason I modelled Minas Tirith, city and castle of the Lord of the rings. I hesitated with Kear Morhen in the game The Witcher. The scene is built in such a way that on the left, there is the city, powerful and strong in modeling, on the right, the simplicity of a child, by the beach plastic toys. Finally, the top of the scen is rocked by the sea, calm and quiet.