Immersive environments is an academic concept and research field focused on the design, study, and application of systems engineered to create a strong sense of presence and engagement for a user within a simulated, augmented, or mixed reality. This domain investigates the technical, psychological, and physiological dimensions influencing the user's subjective experience of 'being there', characterized by multi-sensory integration, interactivity, and narrative or task-driven engagement, holding significance for advancements in areas such as training, simulation, education, therapy, and human-computer interaction.