Mormons say that the angel Moroni visited Joseph Smith and completed the compilation and writing of the Book of Mormon. He told Joseph Smith where to find golden plates buried near his family home. He then translated what was written on those plates (the Book of Mormon). Eleven men are said to have seen the plates and three of them were relatives of Joseph Smith.
In contrast, the local church and Christianity is not built on a faulty foundation. It was built on a solid foundation, not from superstition. Jesus Christ was seen of hundreds and lived among us. The Apostles were eyewitnesses of His life!