More and more doctors are turning to an innovative tool to help children feel their best: nature. Through a growing movement called Park Rx (or Park Prescriptions), physicians are prescribing excursions in the outdoors for the health benefits.

More than 500 miles of trails have been searched in Great Smoky Mountains National Park in an effort to find an Ohio woman who went missing early last week while out for a hike with her daughter.

Chris Biela recently took a hike into one of his favorite spots in Redwood National and State Parks: Fern Canyon. His time-lapse video of the 4-mile round trip Tall Trees Trail takes you to Tall Trees Grove, an alluvial flat next to Redwood Creek that hosts a former title-holder of world's tallest tree.

While a search continued Sunday in Great Smoky Mountains National Park for a missing Ohio woman, a woman reported missing in Sequoia National Park turned up OK that afternoon.