A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla. http://www.atlasobscura.com/places/secrets-of-puebla-tunnel?utm_source=Atlas+Obscura+Daily+Newsletter&amp;utm_campaign=e175e027b0-Newsletter_1_17_2017&amp;utm_medium=email&amp;utm_term=0_f36db9c480-e175e027b0-63203845&amp;ct=t(Newsletter_1_17_2017)&amp;mc_cid=e175e027b0&amp;mc_eid=bb8db3a6a5