Guess the mystery travel picture location and you could win a prize - how to enter

mirror.co.uk:

The Mirror Travel mystery picture competition for September has been revealed - can you guess where we are? Each month, we post a photo - all you need to do is work out where it is and you could win three superb illustrated DK Travel Guide books.

To give you a helping hand, we'll be revealing clues here - so make sure to check back, and follow @MirrorTravel and @TravelEdNigel on Twitter for updates!

This month's picture shows an 800-year-old structure which is part of a vast religious temple complex in a tropical country.

It featured in a Hollywood movie and the temple complex is a very popular tourist destination. CLUE 1:  The film's heroine wore an atom bra I'd erroneously purchased. THE PRIZE: The first correct answer chosen at random