Mexico's National Institute of Anthropology and History has posted photos of the discovery on its website. See the images below. The orbs were yellow, which comes from jarosite, which forms as pyrite oxidizes. When the orbs were used, they would have been glittering balls of gold. Opening the Gates of Hell Archeologists discover the legendary Gates of Hell where not even birds can survive the stench of the mouth of Hades The discovery comes a month after group of Italian archaeologists have announced they have found the legendary "Pluto's Gate," a portal filled with foul-smelling noxious fumes which inflicted a quick death on any person or beast that was driven into its embrace. The temple complex in Hierapolis, now the volcanic-spring restort town of Pamukkale, featured in many ancient legends and historical texts.