1In a large bowl stir together the flour, yeast and salt. Add 1 ½ cups plus 2 tablespoons water, and stir until blended; dough will be shaggy and sticky. Add the figs, walnuts and cinnamon and stir to sort of combine - the cinnamon will be streaky. That's OK. Cover the bowl with plastic wrap or a plate and let it rest on the countertop for 18-24 hours at room temperature.
2The dough is ready when its surface is wet looking and bubbly. Put a piece of parchment on the countertop and scrape the dough out onto it; dust the surface generously with flour and fold the dough over itself a couple times; sprinkle again with flour and cover with a tea towel. (Make sure it's not terry cloth, which will stick.) Let it sit for another hour or two, or even three or four.
3When you're ready to bake, preheat the oven to 450°. Put a 6-8 quart heavy covered pot (cast iron, enamel, Pyrex or ceramic) in oven as it heats. Pull the pot out of the oven, lift up the dough on the sheet of parchment and drop it into the pot. Cover with the lid and bake for 30 minutes, then uncover and bake for another 10-15 minutes, until crusty and golden.
4 Remove from the pot and cool on a wire rack, or eat warm.