The LSU Campus Mounds or LSU Indian Mounds are two Native American mounds, likely of the Archaic Period, on the campus of Louisiana State University in Baton Rouge, Louisiana. The 20-foot-tall (6.1 m) mounds are commonly thought to be more than 5,000 years old, and one estimate places them at 11,300 years old. They predate the Great Pyramids of Egypt, and are believed to be the oldest surviving man-made structure in the Americas, or possibly the whole world.