Translation:Excuse me, ma'am, are there any beaches around here?
You sound as if you're asking if there is some quantity of beach around here. But in English, you'd ask about some beaches, plural: "are there some beaches around here?" (You might also say, "is there a beach around here?" but that doesn't translate the "alguna," so it won't work in this exercise.)
I think this sentence is wrong. It's right: Is there any beach around here?