Any good horror mangas?

Hi guys and girls, was just wondering if anyone knew of a decent horror manga. I have bought loads of different ones and found them all aimed at a slightly younger audience.
If anyone knows of one thats better for adults that would be awesome.

I Luv Hallowen is pretty good, but it isn't exactly scary.... ???

High School Of the Deadand another... this post will edit itself once I find the name :-\Edit: And of course... "Mail"

Berserk sounds like the thing for you!! It is... very adult, but awesome! That is, if you don't mind a few fantasy elements in the horror (medieval torture, pagan hunts, not modern freaky stuff).
It is also pretty old (started in the 1980's but still continuing), if that's your thing.

island would be worth a try

Try Hellsing, I suppose. Tsukihime is one of the best as well, so you might want to read that as well.

'Elfen Lied'or maybe 'Monster'I don't know if they are manga though.PS: hint: if you want a horror anime: any old anime does the job, if you just look at the graphics, terrifying!!

you can check out an old anime called lily cat. it's a clone, rip-off of aliens.

Read Parasyte. It's a bit creepy, but mostly just entertaining.

Higurashi no Naku Koroni would do the job that you could not even sleep.. i watch the anime and that night i really could not sleep

monster is a really good 1 but it only has 18 volumes

I liked Tomie. I'm not sure how many volumes it was but it was gruesome and awesome.

Mangaisland (korean manga),
highschoolof the dead,
Majin Devil,
Kiseikyuu...umm idont know how to spell it ???

Manga :
Petshop of Horrors
Shutter Box
DOLLS

Uzumaki - the author who drew this also drew alot of other horror mangas, the art is scary and the stories are chilling. I have read his work such as:
Model
Oil
The Bishounen (pretty boy) at the crossroad
HospitalI also read Portus, the story is quite nice: about a video game that is cursed (mm sounds like Nanashi no Game..which I am dying to play when it comes out). The art is fantastic, some images are burned in your head.Mermaid is also quite a chilling story, though the art is not scary.

Read the original "The Ring" manga its good and creepy, and "Spiral" a sequel to "The Ring" is grotesque AND creepy.
but thats all i got ???