YOU SAID:
"Where was this picture taken?"
INTO JAPANESE
「この写真はどこで撮られたのですか?」
BACK INTO ENGLISH
"Where was this photo taken?"
INTO JAPANESE
"どこでこの写真を撮りましたか?"
BACK INTO ENGLISH
"Where did you take this photo?"
INTO JAPANESE
「この写真はどこで撮ったんですか?」
BACK INTO ENGLISH
"Where did you take this photo?"
That didn't even make that much sense in English.