it could be from the name of the town Aquinnah in Massachusetts which is Wampanoag
'
Carl Widdiss, a 41-year-old Wampanoag (pronounced wam-pa-NO-og), circulated a petition that asked residents if they wanted to vote on whether
Gay Head should become Aquinnah (pronounced ah-KWIN-ah), which he said means "land under the hill."'
http://query.nytimes.com/gst/fullpage.html?res=9D0CE5DD153AF933A15757C0A967958260
this meaning is also in wiki (sourced from a different newspaper article)
http://en.wikipedia.org/wiki/Aquinnah%2C_Massachusetts
We must hang up in the belfry where the bats and moonlight laugh
We must stare into a crystal ball and only see the past
Into the caverns of tomorrow with just our flashlights and our love
We must plunge, we must plunge, we must plunge