Knock it

She says:
"When you see this sort of countryside you can't knock it"
it's an admiring sentence, but I am not sure about the "knock it". (it's Britain).

Thank you very much

From Merriam-Webster online:
3 : to find fault with. Always knocking those in authority.

Or, "Don't knock it until you've tried it."

many thanks ESC, I never look in Mirriam webster,
I always go to cambridge,(onelook) but this time I'm knocked out, so to speak.

I think I'll have to give you some percentage of my salary. don't you think?
Not that it's too high. actually quite the opposite. but what can I do, I'm in love with tranlating.

This, believe it or not, is what I do for fun. That's payment enough.