Petrified Forest is best known for its ancient trees that have crystallized over 225 million years into rainbow colors. The park also features fossils from huge 18-foot crocodile-like creatures known ...

Located in the south are the major concentrations of the famous colorful petrified wood; in the north rise the colorful banded badlands of the Painted Desert. Giant fossilized logs, many of them ...

Like the name suggests, this state park is home to rare petrified ginkgo trees (Ginkgo biloba), a species of tree so ancient it's widely referred to as a "living fossil." Nowadays, ginkgos grow in ...