CREATE TABLE table_3306 ("Circuit" TEXT, "Location" TEXT, "Date" TEXT, "Series" TEXT, "Winning driver" TEXT, "Winning team" TEXT)

What was the location when the winning driver was Nathana l Berthon?
SELECT "Location" FROM table_3306 WHERE "Winning driver" = 'Nathanaël Berthon'
SELECT "Location" FROM "table_3306" WHERE "Winning driver" = 'Nathanaël Berthon'