Our friends invited us to go to the beach with them for 2 nights and we decided to go with them. Where they had rented the house there was lots of sand dunes and they were SUPER close to the house. My friend and I thought it would be cool to build a fort on one of the sand dunes. It would be like a cave sort of thing. We put a pallet on the top of the fort to make an enclosed ceiling. Then we put sand on the top of the pallet to make it dark inside. And on all sides it had sand as walls. To get in it we dug a walk way to get in the fort.