Nobody knows the exact location of the Book of Mormon's events. Because of that a lot of people question the reality of the events that happen in it, but you know what? I don't care and neither should you.
When you read the Book of Mormon there are examples of faith from the very beginning–Lehi's family leaving Jerusalem without knowing where they're going, Alma's discourse on faith, Ammon willingly helping a Lamanite king and offering to be his servant, and Moroni's insistence that if you ask in faith whether or not the Book of Mormon is true. So, why does a book rooted in faith rather than proof garnish so much cynicism and skepticism?
A lot of it deals with how the Church was perceived when it was first reorganized and how it's still received today.
In the early 1800s when Joseph Smith first reorganized the Church he was branded a charlatan, a money digger, a crook. It wasn't true, but the pastors and preachers in his area were so entrenched in a "war of the churches" that they were not going to lose any ground to an inexperienced teen. That attitude followed the early Saints throughout the entire eastern United States before they were finally pushed West.
Rough beginnings. And even now when history is discussed in schools and the congregations of other faiths Mormons are seen as a joke or the villains (which I really don't understand because they were the ones being tarred and feather and pushed out of their homes repeatedly). But that's the sad truth of the matter. Because of that (and the fact that the LDS Church refuses to bend their standards based on public opinion) the Church is held to higher standards of proof.
Because there has been no physical and definitive archeological proof there are a few different paths of thinking people take: having faith, coming up with ill-supported evidence in North and South America, or demanding evidence that's not there.
Speculation about the location of where the Book of Mormon took place can be fun. There are individuals who have created some convincing arguments that they present as proof; but people who rely too fully on evidence miss the message of the book. The message of the Book of Mormon is not about what you can physically find; it's about how the Spirit speaks to you. It's about the faith you build in the Savior. It's about the love God has for you and what He's done to ensure the gospel can rest in your hands at any time.
So, I'll say it: where it happened does not matter as much as the fact that it actually happened.
Search the scriptures. Ponder the message. Pray sincerely. The truth will come regardless of what anyone else says or does.