The spiral is my favourite symbol so when I saw this article I was hoping the well at quinta-da-regaleira would be included. I visited this magical place in the summer of 2010. The well is known as the Well of Initiation or The Well of Self knowing. I started at the stone temple across from the entrance to speak to the gods. You enter a tunnel - no lights allowed - to reach the bottom of the well. The challenge is to find the way out (hint: climb to the top for the view but there is not exit here!). Symbolic rebirth…Loved it!