This is a picture of sycamore trees. I believe that the sycamore tree in the abandoned church is one of the most important symbols in the book. The book starts with Santiago having a dream about his treasure in the Great Pyramids, and chose along the way to search for that treasure, when it was under the sycamore tree to begin with. Santiago had a dream about this giant treasure, and knew he had to go on this huge journey to get it, while it was literally right under his nose the entire time. Santiago had to go on a huge adventure, have his money stolen twice, and spend just under a year working for a crystal merchant, just to return all the way back to where he started.