At the time of the Madeleine incident there was a sheet metal fence about 1.8m high and painted in .... sorry can't remember. I it is on the videos of the time It shows up I believe on the video on Youtube of 4 May 2007 when the first batch of the Tapas 9 were taken to Portimão for their initial interviews. The site had a large sign on its corner emblazoned "Flor do Mar". Flower Of The Sea.
I think it also turns up on a video of the first Sunday when the McCanns went to mass at Nossa Senhora da Luz.
That fence is essentially the same fence that turns in in Google streetview of Aug 2009, except by that time the fence had become a bit decrepit. The building project had stopped. People had clonked down one side on the west to dump rubbish.
Google Earth traces what the fence went through.
What does the fence look like now (and for around the 3 years I have been here)? The metal panel fence was valuable. It is probably protecting another building site.
The current fence is also around 1.8m high. It consists of wooden posts with a green, plastic, wire mesh fence.
I doubt the current fence really tickles your interest.
Back in 2007, there were at least 2 ways to get over the fence. At the NW end and at the S end electricity cabinets made it easy to go over the top.
I'm fairly sure the 3rd obvious way, NW side under a gap between fence and ground , is on the forum from way back.