At the top of Yosemite National Park's Vernal Fall on a recent holiday weekend, amid the throngs of tourists snapping photos and feasting on snacks and picnic lunches, a squirrel ...

Going to a popular destination doesn't have to mean you'll be overwhelmed by crowds -- as evidenced by this breathtaking trail leading to a geyser.

Yellowstone National Park is huge: 2,221,766 acres or 3,437.5 square miles, over twice the size of the state of Rhode Island.