Friday 29th July 2016, 12.40pm (day 1,800)
This structure looks like it might be a tower, but in fact is the opposite, a well sunk into the ground. From the bottom there are tunnels to explore. The well, called the ‘Initiation Well’, can be found in the estate of Quinta da Regaleira, which is in the town of Sintra, an hour or so from Lisbon, and full of castles and palaces where the Portuguese aristocracy used to hang out to escape the heat of the city. Now it’s just full of tourists. Of which, of course, I am one. But that happens now and again.