story
Chaos fanatic needed a spot to store his vast amounts of experiments before accidentally fusing together the Chaos Elemental and having to escape it, all thats left now is an abandoned research factory full of his failed (and successful) experiments.
Fishing spot
There is a dead, nasty and full of ooze lake in the middle of the research outpost.
Here you'll be able to fish glowfish which is a tradeable, stackable fish you can lure with dark fishing bait and a small fishing rod.
You can then in turn use glowfish to fish "mutated fish" (same fishing level as dark crabs) in a nearby fishing spot with a regular fishing rod, they are grey and look almost dead and lumpy, they are unedible.
herb patch
There will be a dead herb patch, with thorns and stalks instead of weed and it appears as if you cant plant anything there, however you can plant two seeds there, snapegrass seed and a new "burnt seed".
The snapegrass seeds could be planted with 61 farming, and it would yield a dead looking plant, and the burnt seed with 80 farming, and yielding a burnt looking herb, the snape grass plant can be turned into a new 1 dose stackable potion called "cure", you can put cure in mutated fish and theyll turn into either raw anglerfish, dark crab or manta ray.
the burnt herb can be put into a potion to give a 1 dose thaw potion, that bruns you for 2 damage a tick for 5 ticks and can thaw you once every 5 minutes.
mine
there would be a new mine, with eroded rocks instead of regular ones which are somewhat faster to mine, and two rune rocks only mineable with wilderness hard diary, there would also be a mutated runite golem that deals damage trough prayer and a ranged attack which deals even more damage than his melee, you deal bonus damage to him with a pickaxe and he drops some rune bars, he also has a long respawn time
you can maybe get noted ores with wilderness elite diary or something
trees
magic trees drained of their magic for scenery
yep thats all i got