What does it want, Precious?

A husk looking like a giant lighthouse, partially buried in the sand. It is composed of graphene composites, which are flaking off in the harsh winds. The design seems to be based almost completely on circles, with circular openings leading to circular hallways and spherical chambers. There are no corners anywhere, although there are enough depressions for drifting sand to pile up. The wind through the openings causes eerie low noises, like mournful howls. The real mystery is where the propulsion and other technology is: surely it has to be somewhere, but there is no sign that the husk is anything more than a passive building structure. Maybe it is all hidden underneath the buried sections or inherent in the wall material. A field of 836 monoliths, arranged in a phyllotactic spiral in a field. Each monolith is 12.3 meters tall, white, strongly magnetic, and has retroreflector properties: light and other electromagnetic waves in a sizeable part of the spectrum is reflected back towards the source. Passing between them causes effects due to the magnetism: synthmorphs and many forms of equipment are pulled towards the nearest monolith, and the field induces induction currents if something moves too fast (do *not* try to fire a railgun or plasma weapon inside the field). The field seems to react to activity in slightly unpredictable ways and can itself switch to produce massive currents, weird hallucinations in biomorph brains or heat conductive materials. The monoliths appear to be solid, but x-ray scanning will reveal a complicated skeleton-like structure inside each one. A flying wing structure almost a kilometer wide, formed of some kind of organic substance that has dried and fossilized in the environment. There are numerous "maggot holes" in the structure that might have been used by passengers, repair systems or symbiots. The engines are large plasma magnetohydrodynamic thrusters that were powered by some sort of central power plant - thick superconductor "sinews" run to the core of the wing. However, the core section is open and shows clear signs that someone cut it open sometime in the far past using lasers and removed a sizable chunk. Something that looks like a breaking wave from one angle, a mountain from another one and a starfield from a third one. As the viewer moves around the thing seems to change shape. The appearance is an optical illusion with no real solidity or clear source. When something passes through "echoes" sometimes appear a short while later. A wide crater, with glassy trinitite remnants suggesting a nuclear explosion. Inside lies a number of destroyed structures, probably remnants of other ships. Amidst the sand and wreckage are numerous bright yellow plates covered with a text-like pattern of reflective indentations. The pattern is nearly the same, and contains a drawing of something similar to the layout of the remnants.