Bike in tree – Bicycle tree

What is the story behind this photo?

On Vashon Island (near Seattle, Washington), a tree grows carrying a strange passenger – an old bike. There are a variety of stories about how the bike got into the tree. One story goes, a boy went to war in 1914 and left his bike chained to a tree. He never came home and the family left the bike there as a memorial to the fallen soldier. Another less romantic version is that a kid simply put his bike in the tree decades ago and never picked it up, leaving the tree no choice but to grow around the bike. Then, of course there are those who think the whole think is a hoax and just a tourist attraction.