- Ca on City, Colorado Dinosaur Depot is located within an historic fire station, built in the late 1930 s. It contains a visitor center and a working preparatory lab with interpretive displays. Ca on City is the county seat of Fremont County Colorado. Fremont County has long been known as the home of Garden Park, location of the largest Jurassic graveyard in the world. Fossils from Garden Park ...www.dinosaurdepot.com