After Four Days Spent in Nature, Here's What Happened 

When a group of adults spent time in the wilderness without media, they experienced greater creativity and problem-solving skills. The study conducted by the University of London found the impact of time spent in nature resulted in a significant “cognitive advantage.” The reduction in attention-demanding stimuli, such as “sirens, horns, ringing phones, alarms, television, etc.,” aids attention restoration. Rachel and Stephen Kaplan coined the Attention Restoration Theory (ART), which suggests, “nature has specific restorative effects on the prefrontal cortex-mediated executive attentional system.” Essentially, overuse of the brain’s executive system can result in depletion, and this study claims that time spent outdoors helps replenish the mind. You can read the study here