Technology-driven design can support the creation of storytelling experiences that offer innovative ways of transmitting knowledge and information. New technologies also have emerged as tools for making art relevant again and making museums and art galleries hybrid places in which the virtual and digital aspects of stories are combined with corresponding physical artefacts. Observing people’s reactions and behaviors in those hybrid environments requires the examination of ways in which they engage with space in the process of meaning-making by changing and adapting the space to suit their means. Even though differentiation of the concepts of space is broadly explored in the literature, in the context of mixed reality experience design has become hazy again. In our work, we explore practitioner’s view on the ontological issues with defining experience space and discuss its in-betweenness, inseparability and unrealness.