I was searching Flickr for masonic imagery when the Quinta da Regaleira turned up.
(Photo from WaveCult)
This spiral well looks much like a place in the center of the maze in Pan's Labyrinth. The Quinta da Regaleira is a UNESCO Heritage site in Sintra, Portugal. Its nearby proximity to Spain would make it not unlikely that film maker Guillermo del Toro would be aware of this place.
And now it's one of the places added to the many I want to visit. A brief reading of some sites has the place linked to masonic and Rosicrucian ceremony.
Photo from sylphoria
Photos from saolin