Can anyone recommend me some manga with pretty art like karneval? Any genre is fine but sh...

I haven't read karneval but you can read webtoons like
For the sake of sita
Siren's lament
I love yoo

you can read them in line webtoon. the last two have musics in almost every chapter... very refreshing!!

webtoons usually have nice art so that's why I'm suggesting them... sorry(￣∇￣")

This updates are super slow and/or might have been dropped but its super pretty and worth a read if you enough a bit of horror and mystery with a touch of shounen ai. http://www.mangago.zone/read-manga/adekan/

For this one, the story is pretty good and I'm not very much into history nor am I knowledgeable in it but this was amazing to read! The pages are beautiful enough to set as wallpapers too. :v http://www.mangago.zone/read-manga/innocent_sakamoto_shinichi/

And maybe you've read this already but it's super cute. Kanda Neko never disappoints with their artwork. http://www.mangago.zone/read-manga/monster_petite_panic/

Awe I miss Adekan and it's super detailed art. I remember the days when updates were fast.

eek!! ignore my suggestion. they're all shoujo. I read your post wrong! Sorry ╥﹏╥

you could try 07 ghost. the art is pretty and the story is in fantasy land much like karneval.

There are more updates in the scan groups account. Check it out because here there arent all the chapters updated.
http://adekanfan.tumblr.com/chapters

http://www.mangago.zone/read-manga/ran_to_haiiro_no_sekai/
http://www.mangago.zone/read-manga/shimanami_tasogare/
http://www.mangago.zone/read-manga/kujira_no_kora_wa_sajou_ni_utau/

Oh, thanks man I appreciate this. :D