Spear points dating to thousands of years before the Flood (or even Adam's alleged creation, for that matter) found preserved in situ among mammoth bones in Naco, Arizona.
Or the 14,000 year-old footprint of a child at a mammoth hunting camp unearthed in a bog in Monte Verde, Chile:
The kicker is that this isn't even the oldest evidence for human settlement of the Americas. Since the WT loves to trot out frozen mammoth carcasses as "proof" that mammoths died in the flood, who were these mammoth eaters in North America? Were they killed in the flood? Did Noah's "preaching" work extend to North and South America? Is the book of Genesis really bullshit?