A lone tree that grew from a fence post in the South Island of New Zealand has become an unlikely and incredibly popular social media sensation. The straggly crack willow tree on the shores of Lake Wanaka is thought to be at least 80 years old. Recently, this tree has stepped into a global spotlight and become a social media star – with some staying power. Known as #thatwanakatree, it is attracting both professional and amateur photographers from around the world, looking for that perfect shot of the tree – that often looks like it is growing right out of the lake.