where引导的非限制性定语从句问题

问题描述:

where引导的非限制性定语从句问题
where引导的非限制性定语从句的后面要不要加上一个介词?
比如
Many real museums are also the landmark of the city,where they are located (in).
后面这个in要不要加啊?

Many real museums are also the landmark of the city,where they are located (in).
后面这个in要不要加啊?
正确的应该是:Many real museums are also the landmark of the city,where they are located.
不要加后面这个in.
因为where =in the place where