![America's national monuments : the geologic West. [Volume 4], The great biodiversity of the Pacific Northwest: Oregon Caves National Monument](https://illumira-media.s3.amazonaws.com/njcore_21383/tn/njcore_21383-5ef482d6d3fb981911389743a4d85285a7f56d32-medium.jpg)
16:57
America's national monuments : the geologic West. [Volume 4], The great biodiversity of the Pacific Northwest: Oregon Caves National Monument
At the Oregon Caves National Monument, spectacular cave geology is combined with the diversity of plants and animals to tell a unique story of the Pacific Northwest.
![America's national monuments : the geologic West. [Volume 1], Fossil treasures of the Pacific Northwest: John Day Fossil Beds National Monument](https://illumira-media.s3.amazonaws.com/njcore_21375/tn/njcore_21375-9d1725ad73aee0bdeee61f41b0cf9bcae364dc72-medium.jpg)
12:13
America's national monuments : the geologic West. [Volume 1], Fossil treasures of the Pacific Northwest: John Day Fossil Beds National Monument
The John Day Fossil Beds National Monument encompasses 10,000 square miles spanning 40 million years of ancient life.