Build two windmills that spin opposite directions.
I wish I could source it, it someone told a story of a contract no one could meet for dropping in either some heavy equipment to a site or maybe windmill parts? It was a small site and it seemed impossible to land them take off... The winning bidder for the contract just landed the plane then abandoned it. Not sure what else you'd do if your blades are your plane!
It's common to abandon mining equipment at the bottom of the mine, or have tunnel boring machines dig their own tomb. The machines are often custom made, and removal would cost more than their EOL value.
