That is the factory that we visited last year.
That is the factory where he worked last year.
I want to see the place where Tom lives.
I want to see the place which is built in 2002.
I will never forget the day when I met you.
I will never forget the day that we spent together.
They moved the new house which they bought last year.
They moved the new house where they could study better.
I had a wonderful vacation that made me excited.
I had a wonderful vacation when we went to Hainan.