Four great megalithic structures, The Great Pyramid, Stonehenge, the pyramids of Teotihuacan in Mexico, and Tawanaka in Bolivia combine to reveal the place of Atlantis, in the middle of the Atlantic.  When the summer solstice line through Stonehenge is extended, it ends up in Tawanaka. And when the winter solstice line is extended beyond the Great Pyramid, it comes to the Mexican pyramids in Teotihuacan. 

Where those lines cross is near where Atlantis is buried.  But not exactly...

The question of the relationship between the growth of technology and the growth of virtuous character is taken up in this episode.