The mystery of the doors in the trees

They seemed to appear overnight. Small, colorful doors, with locks, embedded in tall trees in a greenbelt in my neighborhood. Quirky, intriguing and mysterious.

What I love about these doors is how they represent in such a great way what makes a mystery book like “Murder Becomes Manhattan” so appealing. The small detail, missed by most (in this case, missed by most passing motorists and pedestrians) yet yielding so many questions.

Of course we know no one, or thing, lives behind the doors. But...