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Which one is correct?

Could you please tell me what facilities are available here?
OR
Could you please tell me about the facilities available here?
OR
Could you please tell me the facilities available here?

Thanks!
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All are fine; the middle one will get you more information.
Comments  
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Thanks!

One more question:

Is it polite to start a question like this "would you mind if...."...or is there some other more polite way to ask it....?

Would you mind if I ask you some questions about your family?
Yes, that is quite polite, though we more correctly use the conditional -ed form: Would you mind if I asked.... A little less formal is Do you mind if I ask....
Thank you very much!
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