We've rounded up must-visit attractions at some of the nation's most popular and off-the-beaten-path parks to help you decide which national park to conquer this year. (Getty Images)| Yellowstone ...

Last year, visitors spent 1.4 billion hours at national park sites. Many traveled during the peak summer tourism season—June ...

The National Park Service is the crown jewel of America’s natural and cultural heritage. The National Park Service, a cornerstone of America’s conservation efforts, is facing unprecedented challenges.

Serving as home to 10 national parks ... is a quick glance at some of the top attractions that set the "Equality State" on par with some of the biggest tourist destinations in the country.

At least five national parks, monuments and forests in Arizona were expected to see protesters objecting to federal layoffs and budget cuts.