Fossil palm frond from Fossil Butte National Monument
Agate Fossil Beds National Monument Nebraska (Mammals such as North American rhinoceroses and bison-sized "hell pigs")
Badlands National Park South Dakota (Ancient horses, rhinos and saber-toothed cats)
Channel Islands National Park California (Pygmy mammoths)
Death Valley National Park California
Denali National Park & Preserve Alaska (Dinosaur tracks, dung and skin impressions)
Dinosaur National Monument Utah & Colorado (Dinosaurs such as Stegosaurus, Apatosaurus, and Allosaurus)
Florissant Fossil Beds National Monument Colorado (Petrified wood and insect and leaf impressions)
Fossil Butte National Monument Wyoming (Some of the world's best preserved fossils of ancient fish, reptiles, birds, mammals, insects and plants; articulated skeletons)
Glen Canyon National Recreation Area Utah (Plesiosaurs and dinosaur tracks)
Grand Canyon National Park Arizona (Trilobites, crinoids, brachiopods, plants, tracks, etc.)
Guadalupe Mountains National Park Texas (Capitan Reef!)
Hagerman Fossil Beds National Monument Idaho (The Hagerman Horse, Equus simpicidens, the first true horse)
John Day Fossil Beds National Monument Oregon (Saber/spike-toothed salmon, ancient horses, brontotheres, "hell pigs", oreodonts, bear-dogs)
Lake Mead National Recreation Area Arizona & Nevada (Coral Reefs and petrified wood)
Petrified Forest National Park Arizona (Petrified wood and archosaurs)
Tule Springs Fossil Beds National Monument Nevada (Mammoths, saber-toothed cats, and ancient camels)
Waco Mammoth National Monument Texas (Only recorded nursery herd of Columbian mammoths)
Yellowstone National Park Wyoming (various invertebrates, vertebrates and fossil plants)
Fossil palm frond from Fossil Butte National Monument
Agate Fossil Beds National Monument Nebraska (Mammals such as North American rhinoceroses and bison-sized "hell pigs")
Badlands National Park South Dakota (Ancient horses, rhinos and saber-toothed cats)
Channel Islands National Park California (Pygmy mammoths)
Death Valley National Park California
Denali National Park & Preserve Alaska (Dinosaur tracks, dung and skin impressions)
Dinosaur National Monument Utah & Colorado (Dinosaurs such as Stegosaurus, Apatosaurus, and Allosaurus)
Florissant Fossil Beds National Monument Colorado (Petrified wood and insect and leaf impressions)
Fossil Butte National Monument Wyoming (Some of the world's best preserved fossils of ancient fish, reptiles, birds, mammals, insects and plants; articulated skeletons)
Glen Canyon National Recreation Area Utah (Plesiosaurs and dinosaur tracks)
Grand Canyon National Park Arizona (Trilobites, crinoids, brachiopods, plants, tracks, etc.)
Guadalupe Mountains National Park Texas (Capitan Reef!)
Hagerman Fossil Beds National Monument Idaho (The Hagerman Horse, Equus simpicidens, the first true horse)
John Day Fossil Beds National Monument Oregon (Saber/spike-toothed salmon, ancient horses, brontotheres, "hell pigs", oreodonts, bear-dogs)
Lake Mead National Recreation Area Arizona & Nevada (Coral Reefs and petrified wood)
Petrified Forest National Park Arizona (Petrified wood and archosaurs)
Tule Springs Fossil Beds National Monument Nevada (Mammoths, saber-toothed cats, and ancient camels)
Waco Mammoth National Monument Texas (Only recorded nursery herd of Columbian mammoths)
Yellowstone National Park Wyoming (various invertebrates, vertebrates and fossil plants)