This is something straight out of a Bond movie ...
STARLINK: SpaceX'S Starlink gateway in Santa Olalla, Toledo, Spain, visible from the A-5 near km 83.
The center unit is another sky-facing trihedral corner reflector array I have reported about at other sites around the world.
Each unit is three metal plates meeting at a right-angle corner. A radar pulse that hits the inside of that corner reflects straight back to the satellite, so the point has a known, stable radar signature.
They are calibration and check targets for synthetic aperture radar (SAR). Using them for Starshield SAR calibration is a reasonable read but that has not been confirmed.
The site is one of five Spanish ground stations, added in early 2025 with Gelida, Barcelona, after Madrid, Alicante, and Huelva.
Pic by Javier, an information security and business continuity (GRC) consultant.