Help the confused tourist ask a polite question without sounding demanding.

"Excuse me, could you tell me ________?"

The correct answer is where the National Museum of Cheese is.

When we form an indirect question (starting with phrases like "Could you tell me..." or "Do you know..."), the word order changes back to normal statement order (Subject + Verb). We do not use the inverted question word order (Verb + Subject) in the second part of the sentence!