Are there any? I don't know of any but I may just be a noob.

( solid/transparent blocks that take up 1 block of space)

glass.. is the only one i know of. they even climb cactus. XD

Ah.
I will test it out.
Thank you very much!

Eh.. tested glass and they climbed it.. and magma would not be useful since it is a grinder...
Thanks for the suggestion though.

As of 1.8 they can climb all blocks with a hitbox that impedes the player, including glass. The buggers will climb anything that takes up 1 block of space.

What are you trying to do?

if you put in an overhang, they cant get over it

i thought they couldn't climb glass panes

They can climb panes and iron bars and the like, but they will get stuck at the top if there is a block on top.
Doors is interesting, haven't tried that before.