Possible Clues:

• Mt. ___ (world's southernmost active volcano)
• To hell with a mixture of beer for you and me
• It's hellish dark before boat returns
• Cavern between earth and Hades
• It was hell before transport came
• Before you can get transport down near the South Pole
• Before public transport arrives to define underworld
• Antarctic peak
• Before you get transport to get down there
• Before transport underground