Very Stupid Question

Hello, I’m a new user!
I found this forum on google several time, but i’ve never registered on this(is it a correct phrase? I’m not sure).
So, i know that my English isn’t good but i have a stupid question.

“I have been in/to Brighton” ?
I have to use In or To? I can use both proposition? Are there differences?

Thank you, anyway!

Welcome to the forums Lyon.

You would usually use ‘I have been to Brighton’
You can use ‘in’ if you mention a more specific place in Brighton.
I have been in Brighton’s Royal Pavilion.