The positive effects of the natural environment on human health are well studied. However, it is not always possible to use real natural environments or plants in healthcare settings. We would like to develop a low-cost, effective, and aesthetic alternative. For this purpose, we designed artificial natural structures based on fractal geometry. Within the framework of a randomised controlled trial, we would like to investigate their effect on different variables (stress, emotions, pulse, and blood pressure) in humans. An indoor plant will serve as a comparative condition. In addition, we will conduct a control condition without stimulus.