SkeletalDrawing.com: An anatomical resource for artist and amateurs who want to learn about the science behind restoring prehistoric animals, with an emphasis on dinosaurs. Includes many skeletal reconstructions.
Fossil Triassic plants of Sonora, Mexico: A discussion of fossil plants from the Santa Clara Formation accompanied by photographs.
Fossils In Death Valley National Park: The paleontology, geology and natural wonders of Death Valley National Park (and more); many images of fossils; field trips; paleontology links, plus links to Death Valley.
Middle Triassic Ammonoids From Nevada: A virtual visit to a world-famous fossil ammonoid locality in Nevada roughly 235 million years old--it could well be the single best middle Triassic ammonoid locality in the world; many images of fossils; on-site images.
The Dinosaur FAQ: This collection of documents answers frequently asked questions about dinosaurs, and in doing so seeks to present a digestible tutorial on scientific background concepts such as taxonomy, phylogeny and anatomy. It is targeted at the intelligent layperson. It was assembled by an amateur, based on information provided by professionals and others on the Internet's Dinosaur Mailing List, and has been checked for accuracy by professional palaeontologists.