and it s called pluto s gate. abc s dan harris reports. reporter: the gates of hell have long figured in myth logically minded tv shows, everything from clash of the titans. go to the underworld, kill medusa. reporter: to buffy the vampire slayer where sunnydale is built on top of it. now scientists say they discovered the actual entry way to the underworld or at least where the ancients considered it to be. if you are picturing a sinister, pulsating portal, not so much. this is what is left of the so-called pluto s gate. the ruins in southwest turkey were an elaborate temple built around a cave people believed led straight into the depths of hell. back in 24 a.d., the greek historian strabo wrote this space is full of vapor so misty and dense one can scarcely see the ground any animal that passes inside meets instant