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With swathes of bushland and ocean all around, the ostensible ease of concealing a body in Antigua may partly explain the absence of answers many families suffer.

The Hunter Valley in New South Wales is known for its vineyards and native bushland and has a reputation as a wedding hub.

Hidden among thick bushland in the outer suburbs of southern Sydney sits an expansive facility housing a technological breakthrough.

In recent months, a string of similar incidents in some of Sydney's leafiest and wealthiest suburbs has baffled a nation rather attached to its bushland.

"It was actually, ironically enough, around National Tree Day that I found out," she says, gazing out over the bushland, which is still scorched brown nine months on.