[Compilation] 9 World Mysteries So Interesting They'll Keep You Awake! Traces of Japan Found in Ancient Ruins Worldwide [Slow Commentary]

I'm Reimu, speaking slowly. I'm Marisa, too. There are many mysterious structures all over the world, aren't there? Yes, indeed. There are so many buildings shrouded in mystery. There's a theory that these mysterious structures might have been built by the ancestors of the Japanese. Oh, really? I've never even thought of that, even though I'm Japanese. Today, I'm going to talk about mysterious structures found in Peru and Saudi Arabia. Well then, let's take it slow today. First, let's talk about Peru. Around the 13th century, the last state of the Andean civilization, the Inca Empire, flourished, centered around what is now Peru, Ecuador, and Bolivia. The city center of Cusco in South America, which was the capital of the Inca Empire, was registered as a World Heritage site in December 1983. It must have been an amazing civilization with high cultural value if it was registered as a World Heritage site. Ah, that's right. The civilization that developed in the Inca Empire is called Inca civilization, and its characteristics include massive stone architecture and precise stone processing techniques. Products like pottery and textiles, and the Inca road system with canals and ditches alongside roads paved with stones and pebbles, are famous. Building such precise structures with stone and pebbles shows they had amazing technology. That's right, but despite having such advanced technology, the Inca civilization was a society without writing. Huh? To have such advanced technology yet no writing is very surprising. Because they had no writing, it's unknown how the structures remaining in Cusco today were built. It feels like such excellent technology going unrecorded for future generations is a real waste. You're right. Exploring the city of Cusco, you find that stone masonry is used for the foundations of various buildings. The gaps between these stones are packed so precisely that not even a god could pass through. Is that even possible? Among them, the stone arrangement called the 12-angled stone, perfectly fitted along Amauta Avenue, features high-quality stones with complex shapes fitted together like a puzzle without any gaps. It's said that even modern technology would find this difficult to replicate.