What if Denver wasn't always a mile high? Journey through 300 million years of Colorado's geological history, revealing the ancient landscapes that shaped the modern Front Range. Explore the rise and fall of mountains, the advance and retreat of seas, and the dramatic climate changes that transformed the region.

Ancient Denvers unveils the fossil record, showcasing the dinosaurs, mammals, and plants that once thrived in these now-vanished environments. Discover:

• The origins of iconic geological formations
• The stories behind Denver's fossil discoveries
• The forces that sculpted the Rocky Mountains

For anyone curious about the natural history of Colorado, this is a fascinating exploration of the deep time that lies beneath our feet.