What are examples of language sounds that English speakers do not routinely, if ever, make? What are they called?

For example, Arabic has a letter, like “H” but it sounds sort of like clearing your throat. It took me a while to get the hang of it.

I figure as long as tongues, throats and nasal passages contribute to sounds, those sounds must show up in a language somewhere.

Just curious, since Fluther seems to have a pretty broad membership.