Located in the Sheep Rock Unit, the Thomas Condon Visitor Center is a National Park Service research facility containing an outstanding paleontology lab dedicated to the John Day Fossil Beds. Picture windows let you view the working laboratory and collections room with over 60,000 specimens. In the fossil museum gallery, you can walk through nearly 50-million years of the Age of Mammals. Hundreds of fossil specimens are displayed, along with eight large murals depicting plants and animals of the time.