Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_18303274_1 ( circuit VARCHAR, fastest_lap VARCHAR )

### Question ###
Luis Salom had the fastest lap on which circuits?

### Accurate SQL ###

SELECT circuit FROM table_18303274_1 WHERE fastest_lap = "Luis Salom"