Sanctuary 4, lies to the right of the 4th hole. At the north-east end there is a sheltered grassy area set with old wild olive trees. On one side of this area are ornamental plantings, and on the other a bank resplendent with wildflowers in spring. At the south-west end of this sanctuary there are dense bushes over a deep culvert under the service road. Though man-made, this culvert is one of the most important sites in all the sanctuaries, for it is here that rare white-rumped swifts regularly nest.