To add to it...

2. We also saw Kevin Sr. use probably the same telephone booth to call Matt Jamison

3. Australia is a unique spiritual place. I've linked this before, but it's really a great read. Religious scholar Reza Aslan was a major consultant on the Leftovers and he had this to say about Australia (the interview is from after the second season premiere):

http://www.vulture.com/2015/10/leftovers-questions-reza-aslan.html

Kevin Sr. says he’s cured and moving to Australia. That’s the second reference to the country; the first was the guy in the tower sending a letter there.

Australia is almost universally understood as the seat of ancient spiritual power, particularly the sort of inland parts, because it’s such a unique landmass with a unique ecosystem. Some of the oldest tribal shamanistic traditions in the world still exist there in vibrant form among indigenous peoples. You see in pop culture and in books the concept of the walkabout, which has this mystic sense to it. People who don’t even know what a walkabout represents use the term when they’re talking about a spiritual journey. In fact, now that I think about it, John Locke of Lost was in Australia on a walkabout before the plane crash!