These tracks are in the riverbed of the Paluxy River in Dinosaur Valley State Park, near Glen Rose, Texas. The water is clear enough to afford a good view if you are up to the hike to reach them. The photo shows a complete track, large and rounded, made by the forefoot of a Pleurocoelus. To the right and above that track is a track made by the huge, 50 foot long, 30 ton creature walking more on its toes. There are also two clear prints from an Acrocanthosaurus in this shot.