Visiting a US national park this summer? Once there, don't do this or you'll be fined

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You can "stop and smell the roses" at U.S. national parks — but don't expect to add them to water.

Many visitors pass through America’s 429 national parks, with some 325.5 million people taking in the beauty last year alone, according to the National Park Service (NPS). Visitors may admire the wealth of flowers the parks have to offer, but they may not know that plucking one could be considered a federal offense.

THIS POPULAR FLOWER IS IN SENSATIONAL FORM IN NEW ENGLAND THIS SUMMER Kyle Patterson with Rocky Mountain National Park in Colorado told FOX 31 that picking a wildflower could cost a person up to $250 in fines. "Over four million visitors come to Rocky each year. If everyone picked a flower in the park, there would not be any flowers left for others to enjoy," said Patterson.

The National Park Service preserves natural and cultural resources and prohibits visitors from picking wildflowers from its 429 parks nationwide. (NPS) "This would dramatically change the landscape for future visitors ." The mission of NPS is to "preserve the natural and cultural resources for the enjoyment, education and inspiration of this and future generations," according to the agency's website.

YOSEMITE RANGERS URGE VISITORS TO NOT BURY THIS IN NATIONAL PARK: 'LET'S KEEP THINGS CLEAN AND CLASSY' Patterson said the wildflowers provide food for bees, butterflies, mule deer, marmots and pika. Many visitors pas.