Tarantulas, they really creep me out. Other spiders I'm still nervous about but the tarantulas give me the creepy crawlies.

Also I have a big problem with heights, I really don't like ladders or even standing on a chair to change a light bulb. Really high things absolutely terrify me like to the point of not being able to move and feeling like I might hyperventilate.

The other thing that really freaks me out is deep bodies of water that I've never been in before. It's not the water that freaks me out, it's what might be living in the water, think creature of the black lagoon. Once I swim in it once without being eaten then I'm fine, but the first time I am terrified.