- Which national park was America's first, and what hot-water features will you find there?
- In which national park would you find rock formations called the Witch's Finger and the Devil's Armchair?
- And what exactly is a saguaro, almost 2 million of which can be found in its namesake national park?
From the high peaks of the Rockies to the lows of Death Valley, from the Statue of Liberty in the East to the redwood forest...