Is the following sentence correct?

A："What time is best to visit the tourist spot?"
B："I think it's better to visit there at 7pm."

Can I use "What is the best time to visit the tourist spot?" instead of
"What time is best to visit the tourist spot?"

Thank you!

Question

Is the following sentence correct?

A："What time is best to visit the tourist spot?"
B："I think it's better to visit there at 7pm."

Can I use "What is the best time to visit the tourist spot?" instead of 
"What time is best to visit the tourist spot?"

Thank you!

Answer

Both structures are correct. But A = a question and B = the answer to the question A. 
So you can ask the question A like you suggest. And if asked the question A, you can respond with your answer B.

PERSON A: "What time is best to visit the tourist spot?"
PERSON B:  "I think it's better to visit there at 7pm."

Answer

You can ask it either way, but  I think "What is the best time..." sounds more natural.

Answer

Definitely you can. Either way is correct.