A Natural Setting
Assuming that our modern comforts have always been there is easy. Cell phones, power, clean water, and things like them are easily mistaken as given; misunderstood as ordinary parts of life. I've seen a number of articles discussing a "new" trend of doctors prescribing time in nature to combat anxiety, stress, and other ailments. Called "forest bathing," ecotherapy, nature therapy, or simply hiking, the idea behind it is to disconnect from society and instead spend time, unplugged, outside.
Studies have shown that there may be positive outcomes associated with time in nature related to decreases in anxiety, stress, blood pressure and other things. But an understanding of the mechanisms behind that relief remain elusive.
I'd argue that some part of the benefit comes from a deeply rooted connection in us to the natural world. One formed over ages and ages spent closer to the dirt, the stone, and the trees.
Try it out, take a weekend backpacking trip or spend some time far enough outside of town that you can't hear the noise from the road. Build a campfire. Listen to the wind blowing in the trees or over the land and remember: you're part of this too. No cell reception required.