The area between the two runways should have been flattened and filled
Bear in mind that the threshold of 18R is 81ft (25m) lower than the threshold of 18L
the threshold of 36R is 42ft (12m) lower than the threshold of 36L
there's still going to be a slope there.
Comparing the photo to the satellite pic, it sure looks like 36L, and matches the description given by an Iberia captain in a much earlier post