On our Rolling Stone Music Now podcast, Walsh broke down the unlikely backstory of one of the greatest albums ever made – with influences ranging from the J.

Walsh’s excellent recent book Astral Weeks: A Secret History of 1968 reveals, Morrison actually conceived the album in - of all places - Boston, Massachusetts, where he was essentially hiding out after leaving behind the record deal that yielded “Brown Eyed Girl” the previous year. If the mystic wanderings of Van Morrison’s 1968 masterpiece Astral Weeks have any geographic setting at all, it’s their creator’s native Belfast, and, of course, the viaducts of his dreams.