The whole sentence means that where do they look differently? So here actually the '地方‘ can be assigned to "where". In Chinese, anything related to location no matter 'position' on your body or a big 'position' such as a street or the place people stay all be described as '地方’. Just imagine in English, location, position, where are combined as a single word that is location.

他们有不一样的地方吗？ 1. 地方，在这里，并不是指 ”地理位置“（not "a place" ）. 在这个句子中，”不一样的地方“ means “something not identical"。 2. “有不”， wrong comprehension. it should be "有“ / ”不一样的地方“。

他們有不一樣的地方嗎？ = Did they own any different things ( or appearances) ? We can separate this sentence for six parts 他們 / 有 / 不一樣 / 的 / 地方 / 嗎 First , we can take out the word “嗎” , and then it’ll change to affirmative sentence 他們有不一樣的地方 = They own the different things . 1.他們 : They 2.有 : Have / be / own 3.不一樣 : 一樣 in Chinese , we call it “ the same “ with the same meaning of “相同”&”一致”&”同樣” and we should know that’s a adj. . So, when you see the word “不” before the adj. , seeing it as a negative meaning. Thus , “不一樣” should translate to “not the same” or “different”. 4. 的: means someone’s 5. 地方: Because in this article the girls won’t own the places, we should see the word as “something” or “ things” . Also , it depends on the article , we can say it means “appearance” or ” social position “ etc. Articles didn’t say it clearly because it want reader the guess what is the “things” they owned different. For example , we can say “ 他們不一樣的地方是外表 “ The things that have differently are appearance .

他们／有／不一样的／地方／吗？ Do they have any difference? / Is there any difference between them? 地方：usually means a place, but also means something (here, "something" makes sense) I think the cop wants to find what is different physically between the twins, so... :)

And if you translate word to word : They / have / different / things ?