Possible Clues:

• Get-rich-quick place
• Lode of gold around the road
• Party radical shortly joining Electric Light Orchestra could be a gold mine
• Dole road may reveal area of unexpected wealth underfoot
• Poe poem written at the time of the California Gold Rush
• "Where can it be / This land of . . ?", asked Poe
• Poe poem about a knight's lifelong quest
• Seems that either the Spanish or the artist might so for the gold there
• New deal secures gold - then there's party in affluent place
• Classic Caddy