This is one of those puzzling finds, dinosaur tracks and human tracks found together in the ground. Found in a limestone at the Paluxy River in Texas, these tracks have caused a huge controversy. Those who believe in creationism believe that it shows that man and dinosaurs were together and that dinosaurs were not here before man. The prints that appeared to be human were found to be partial step-down of some of the dinosaur prints and erosion. As well, there were also some obviously carved out tracks in a different rock area.
For a really great article with more details about the unearthing and study of these tracks, go here.