Here are two comparisons to keep in mind when discussing Book of Mormon archaeology in North America. There is a lot of evidence already, but even more yet to be found.
1. Magdala, Israel. Not long ago a site in Israel was discovered under 20 inches of topsoil that had not been touched in 2,000 years. It was a first-century synagogue, complete with mosaic flooring, frescoes, pottery and coins. Plus, it has the "Magdala Stone," which is a stone altar featuring a menorah, the oldest such one to be found outside of Jerusalem.
The photo and overview here, a video here, and background here. More photos and details here.
2. Battle of Hastings. The famous Battle of Hastings was fought on Oct. 14, 1066. William's victory led to his coronation as the first Norman king of England. There were supposedly 10,000 people killed at the battle, but neither the remains nor any artifacts from the battle have ever been found. There are at least three possible sites, each supported by various forms of evidence, and all within a few miles.
Now, some people claim the battle took place at this roundabout: