Remember Kemmerer, the site of the J.C. Penney Mother Store and the Penney homestead? This small town in southwestern Wyoming has another claim to fame. Just outside the town is Fossil Butte National Monument, also known as America's Aquarium in Stone.
Although most of Wyoming is currently a high desert, it was once covered with water, and water means fish. Lots of fish, not to mention mammals, amphibians, and plants. What makes this site worthy of national monument status is that the fossils of these plants and animals are unusually well preserved. It's a paleontologist's delight.
If you'd like more information, you might want to visit the National Monument's web site.