Hidden tunnels beneath Mexican pyramid are ‘PASSAGES TO THE UNDERWORLD’ A PYRAMID in Mexico contains hidden passages to the underworld which have been revealed in unprecedented detail. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Prehistoric human DNA found in caves without bones in 'enormous scientific breakthrough'SEX ROBOTS UNVEILED: Race on for AI dolls who will change sex industry foreverCourt Gives Trump Small Victory in Push Against Clean Power PlanTrilobites: 6 Bots That Deliver Science and Serendipity on TwitterDr. Joseph Lifschutz, Who Asserted Confidentiality Right for Therapists, Dies at 92Gary Steigman, Who Teased Out the Universe’s Dark Secrets, Dies at 76