The series of clean-lined circles carved into the earth at the top of Inwood Hill Park began appearing about a year ago. With fresh rainfall, they’d be gone. Their disappearance seemed almost as important as their appearance, calling attention to areas of the forest that park-goers might otherwise overlook. The circles appeared in snowfall, then melted away. The creator is Young Jee. Over the past year, Jee’s circles have become more elaborate, with textures made from wood chips, pine, and pebbles. Last Sunday, outlines of sticks were used and circles morphed into curvacious striations. Full vistas came into view.