We first met him in London, where we lived in the early eighties.
There is a site on the internet where you can download Classic movies.
Though he never married her, he built her a house where she lived and raised their son.
As seen from the above examples, where in a relative clause always refer to a place.
How to Use Which in Relative Clauses?
Which is a relative pronoun. In fact, it is one of the most used relative pronouns in a relative clause. Traditionally, this relative pronoun was used in the formation of non-defining relative clauses. As mentioned above, this type of relative clause gives additional information to a sentence. For example,
The festival, which lasted all day, ended with fireworks.
He has missed his bus, which means he is going to be late.
However, in modern usage, many people use this relative pronoun with defining clauses as well. Most people consider both uses grammatically correct. However, it is better to use the traditional grammar rule (which in the non-defining relative clause) in formal writing.
What is the Difference Between Where and Which in Relative Clauses?
Where is a relative adverb whereas which is a relative pronoun. However, we can use both of them to form a relative clause. Where in relative clauses always indicate a location whereas which can indicate a person or a thing. This is the key difference between where and which in relative clauses. Moreover, where can occur in both defining and non-defining relative clause. However, which mainly occur in a non-defining relative clause. The below infographic presents the difference between where and which in relative clauses in tabular form.