Most popular theory is that, due to its shape and other observed factors (precise pyramidal geometry, golden ratio math, wondrous natural life, strong electromagnetism with fine frequencies, endemic plants, healthy energy radiation, special climate, mystical cultural heritage, naturally radiation-ionized air, Tesla waves), the mountain had to be artificially built. Claims are made that it is a multi-dimensional portal, that a channel leads from the top of the mountain to below the ground being used as a launch pad for alien spaceships and that Rtanj is an oscillator and resonator of the subtle energy hubs. Alleged sightings of the flying balls over the mountain became a common place.