can I say "pay there a visit" or "pay a visit to the country" ?
Oh, you live there? I think that country is a beautiful place, if I have an opportunity I will ___________

I want to replace with
- pay there a visit.
- pay a visit to the country.

I don't wanna say "pay you a visit" because it means I want to visit the person. I want to say "visit the country" but I want to use "PAY .... a visit ..." because it sounds more nice. I wonder if it is possible to replace the person for "there" or "city/country"...

Question

can I say "pay there a visit" or "pay a visit to the country" ?
Oh, you live there? I think that country is a beautiful place, if I have an opportunity I will ___________

I want to replace with 
- pay there a visit.
- pay a visit to the country.

I don't wanna say "pay you a visit" because it means I want to visit the person. I want to say "visit the country" but I want to use "PAY .... a visit ..." because it sounds more nice. I wonder if it is possible to replace the person for "there" or "city/country"...

Answer

No, we don’t say “pay there a visit.” We might possibly say “pay a visit there,” but we’d usually just say “I’ll pay a visit,” with the destination understood. As a general rule in English, there is no requirement to mention the indirect object (or include prepositional phrases) that don’t provide new information.

Also: We don't write "wanna" -- it's just how we pronounce "want to" or "want a."

Answer

I will pay a visit to that country.
I will pay that country a visit.
I will pay a visit there.
In descending order of naturalness ;) 
Try not to use 'wanna' in written language. It's not natural.

Answer

You can say you want to pay a visit to a country, or pay the county a visit. That's fine.