A novel electronic system provides a mixed-reality live environment sharing between a surrogate visitor, who is on-site at a physical landmark, and remotely-located visitors via holographic space live streaming. This novel electronic system reduces the logistical complexity and bottlenecks for providing mixed-reality holographic environments to a large number of participants in real-time by virtualizing the visitors' mixed-reality experiences through a perspective of the surrogate visitor, who may be an on-site curator or a qualified tour guide. The surrogate visitor wears or carries a mixed-reality recording device to scan the physical landmark via walk-through, and a holographic mixed-reality space synthesis module and graphics processing components generate a holographic instance of the physical landmark, which is subsequently teleported to the remotely-located visitors own spaces for superimposition of the holographic instance in their own spaces for immersive mixed-reality experience through head-mounted displays, without creating an overcrowded condition to the physical landmark itself.