I have even some concepts of "points of interests":
Pyramid: These contain old weapons & armour, traps and mummified corpses. Spawns only in deserts. Square layout that gets smaller the higher you are in pyramid.
Crashed capital ship: If one has the resources one can check the damage, EXAMINE it and then repair it. The ship can be used again. Or one can salvage things from it. Standard ship layout, expect that some rooms are altered. (| [] |) for example may be: #| [} /) can spawn anywhere.
Abandoned dungeon: Old prisoners that attack you whips, electro-rods, vibro-weapons, and rare blueprints. Can spawn anywhere.
Serenity sanctuary: One can meditate here to commune with ancient powers, to get martal arts moves. Scripts can also spawn and also armour and weapons used with some martial arts techniques. Can spawn anywhere.
Underwater temple: Aquatic weapons & guardians wait there to protect what is theirs. Spawns only in oceans, common in water worlds.
Psyker Sanctuary: The places where hunted psykers commune with their warp powers unlocking more of them. One can become psyker if one desires to understand them. Spawns in flatlands,jungles,forests and deserts.
Shelter: One can find many items here, including top-grade weapons, armour, rare blueprints, some feature spaceports which contain partially assemled ships. (Engines and some modules are in place but the ships are damaged and unfueled) Spawns everywhere expect no-atmosphere worlds.
Elemental shrine: If one PRAYs at the shrine one will become an avatar of the elements which will give great powers. Extremely rare, but spawns anywhere.