Spiritual retreats have a long history within various religious traditions, and in the twenty-first century also offer a potentially valuable experience to a much wider audience. Opportunities to get away from the busyness of life to rest, relax and restore balance are sought by individuals from many walks of life. Spiritual retreats involve separating from everyday life and entering a new temporary experience that enables restoration, transformation, healing, renewal and personal development. Technological advances and the ever-increasing information overload in all spheres of life make it increasingly difficult to disconnect from technology and work, balance leisure time with competing demands, and actively maintain psychological health. One important aspect in this regard that is often taken for granted is the capacity to direct attention. This capacity is highly susceptible to fatigue but is vital if we are to function effectively. It is therefore important that individuals are able to recover cognitive capacity so they can not only navigate but flourish in their context. Attention Restoration Theory posits that spending time in a restorative environment facilitates recovery from directed attention fatigue. Restoration is increasingly being recognized as an important outcome of religious tourism experiences and there is an expanding body of literature demonstrating the potential of religious and spiritual tourism to positively influence wellbeing. There has been minimal empirical investigation, however, into the restorative experiences and benefits of spiritual retreats and there is a lack of practical recommendations for designing retreats that foster wellbeing outcomes. This thesis, consisting of three interconnected essays, draws on Attention Restoration Theory as the underpinning framework to explore the restorative potential, experiences and outcomes of spiritual retreats. The religious vocation provides an apt context for this research as annual spiritual retreats are often included as part of the clergy support structure. Clergy within four Christian denominations in Australia who attended one of 17 retreats during 2016 were invited to participate in the research. Quantitative and qualitative data were collected using questionnaires before, at the conclusion of, and two weeks after the retreat to investigate if and how restorative outcomes occur and the factors that lead to immediate and continuing restorative outcomes. Follow-up interviews were also conducted with 30 participants to further explore the restorative experiences and outcomes of the retreat.