The relationship between nature and human health has garnered considerable scholarly attention in recent years as urbanization and contemporary lifestyles increasingly distance individuals from natural environments. This chapter examines the multifaceted ways in which nature influences physical, mental, and emotional wellbeing, emphasizing the importance of incorporating natural elements into daily life to promote holistic health. Research consistently substantiates that exposure to nature whether through green spaces, forests, urban parks, or aquatic environments mitigates stress, elevates mood, and enhances cognitive function. These benefits are attributable to mechanisms such as decreased cortisol levels, heightened physical activity, and the restorative properties of natural landscapes in alleviating attention deficits and mental fatigue. The chapter begins by examining the physiological effects of nature, including its ability to lower blood pressure, enhance immune function, and promote physical activity. It subsequently discusses the psychological advantages, such as the diminution of symptoms associated with anxiety, depression, and stress-related disorders. Case studies and empirical evidence demonstrate the efficacy of nature-based interventions, such as forest bathing and green prescriptions, in optimizing mental health outcomes. Moreover, the social dimensions of nature are explored, focusing how communal green spaces facilitate social cohesion, alleviate loneliness, and enhance community wellbeing. Nevertheless, barriers to accessing nature, including urbanization, socioeconomic inequities, and environmental degradation, remain prevalent. This chapter is divided into three main sections. The first section explores the relationship between humans and nature, focusing on the physical, physiological, and cognitive dimensions. It provides examples to illustrate each of these dimensions. The second section presents policies and practical applications related to health and its various dimensions within the context of urban landscape planning and design. Finally, the third section identifies research gaps in this field and outlines a roadmap for future research. The chapter also advocates for equitable access to green spaces and the integration of nature into urban planning and public health frameworks. It also highlights the necessity for further research to clarify the long-term impacts of nature on health and to develop scalable, nature-based interventions for various populations. In conclusion, this chapter advocates for a transformative shift in recognizing nature as a vital pillar of public health. By prioritizing the incorporation of natural environments into urban design, healthcare systems, and community programs, societies can leverage the therapeutic potential of nature to foster resilience, wellbeing, and a sustainable future.