In a large bowl, mix together the flour, salt, yeast, and water. The dough should be sticky and somewhat loose. If it is too dry, add more water, a little bit at a time, until it reaches the desired consistency. Unless it is really soupy, don't add more flour.
Cover the bowl with plastic wrap and let the dough sit at room temperature for 18 hours. Because of the long rise time, room temperature is what you want here (not a warmer place like with other bread dough, which could make is rise too much). After the 18 hours, the dough will have risen and spread out in the bowl and will have bubbles on the top. It will still be very sticky and loose.
Place a piece of parchment paper on your work surface and sprinkle it with flour.
Sprinkle the dough in the bowl with a tablespoon of flour. Lightly flour your hands and go around the bowl once or twice, pulling the edges of the dough away from the bowl and in towards the center, folding the dough in on itself and gently making a ball shape. Remember, this is a no-knead dough, so do this quickly and don't work the dough too much. Also, the dough is going to still be sticky and pretty loose at this point, so it's not really going to hold a ball shape all that well, but that is totally okay. Don't add more flour.
Remove the dough from the bowl and place it on the parchment paper. Then place the parchment paper and the dough into another large bowl (or you can wash out the bowl you used for the dough and just put it back in there if you don't want to dirty another bowl).
Cover the bowl with a clean kitchen towel or plastic wrap and let it rise at room temperature for 2 hours.
After 1½ hours, when you have about 30 minutes left in your rise time, place a Dutch oven with the lid on in the oven and preheat the oven to 450°F. I use a 3½-quart Dutch oven (see notes below).
Carefully remove the Dutch oven from the oven and remove the lid. I recommend putting an oven mitt or pot holder on top of the lid to remind you that it is hot.
Lift the parchment paper and dough out of the bowl and place it into the hot pot. Put the lid back on the pot and return the pot to the oven.
Bake for 30 minutes with the lid on, then carefully remove the lid and bake for another 15 to 20 minutes with the lid off or until the bread is golden brown and crisp.
Remove the bread from the pot. Allow to cool on a wire rack before slicing and serving.