Well, you COULD add "the place", but the sentence is completely annalyzable without it. wh-word (who what when where why how that) clauses can act as adjectives: "I looked at the man *who had asked me the question*" or adverbs " We will start *when you are ready*" or nouns: "I explained *how that was possible*" 5:00 is *when we will start*"" In your sentence, the wh-word clause was acting as a noun. If you added "the place", then the wh-word clause would act as an adjective. Both are equally acceptable. You can read more about wh-word clauses here: http://www.grammar-once-and-for-all.com/syntax/wh-word-clauses/