Double tap to edit “The Maglev Train System” That’s about it for our general overview of Agartha; the only other thing to mention is the transportation system. There is an ancient maglev train system that runs under the entire surface of the Earth, which connects the different caverns to each other, and which also connects our world to different worlds through portals that the trains pass through. No one is entirely sure who built this portal system, but it’s suspected that it was the Paa Tal (Ancient Builder Race) almost 200 million years ago.