Underground cities talked about as evidence from many sources points to their existence. The Aztecs, Hopi, and other tribes point to their origins from the underground. In other parts of the world many underground cities exist, cultural similarities and legends from the orient, the record of Fusang talks of underground cities in a far away land with a massive canyon. Other sources, from a Mexican treasure map to Spanish records also talk of massive underground caverns where treasure and records of an ancient people are contained. Native hieroglyphs also show evidence of underground cities and caves. Dan and Rick give the most in depth account of evidences and clues that lend credibility to underground cities along the Grand Canyon. You can contact Dan Lowe for information about donating to NAPAA or to purchase his books and research material at: http://www.tuscoro.com/ To book a 3 day research trip with NAPAA, spring or summer of 2019 contact Rick at [email protected] All trips include, meals, lodging, informal evening seminars and daily excursions to research sites. $1,500 per person, based on openings and availability.