This study examines "VirtualGeo", a Mixed Reality and Generative AI platform designed to enhance U.S. geography knowledge among international students. By integrating immersive technologies, VirtualGeo allows students to engage with spatial content within an interactive digital landscape. Using a mixed-methods approach, the study evaluated the platform's impact through pre- and post-tests measuring geographic knowledge, map-drawing skills, and cognitive load, complemented by qualitative interviews to capture students' learning experiences. Findings show significant gains in international students' geographic understanding and underscore VirtualGeo's potential to support adaptive and student-centered learning. Implications suggest that VirtualGeo is a scalable tool to teach geography and other spatial disciplines, which highlights new possibilities for research, policy, and practice in digital education.