""Veiled Doors"" explores humanity's enduring fascination with spiritual portals and hidden gateways to other realms. Examining historical accounts, religious texts, and anthropological studies, the book investigates myths surrounding access points to divine or forbidden knowledge. It highlights how cultures worldwide have designated specific locations, such as caves and temples, as sacred sites believed to be conduits to different spiritual realms. The book also delves into rituals designed to induce altered states of consciousness, viewed as pathways to spiritual connection and religious experience. The book unfolds in three parts, beginning with an introduction to liminal spaces, sacred geography, and altered states, then explores examples of purported gateways across cultures, including ancient Egyptian temple complexes and Himalayan pilgrimage routes. Finally, it critically evaluates evidence for and against physical gateways, considering psychological, cultural, and neurological explanations. While empirical evidence for physical gateways remains unsubstantiated, the book emphasizes the real and powerful nature of human transcendence and spiritual seeking, offering a balanced perspective suitable for those interested in spirituality and religion.