Looking for ways to celebrate National Park Week in April? Check out these 5 Delaware parks "most popular" among travelers, according to a survey.

National parks offer free admission Saturday for the start of National Park Week. Here's where to go near Reno, Las Vegas and other parts of Nevada.

A beloved area at Arches National Park in Utah was closed indefinitely ... Play the USA TODAY Daily Crossword Puzzle. The park also announced it would be removing garbage cans and picnic tables ...