Deep in the woods of the West Pomerania region of Poland, an entire section of trees bends at sharp angles near their bases, forming an odd and entrancing phenomenon known as “The Crooked Forest.”

Why do the trees bend like this? No one is quite sure.

Some have theorized that harsh weather conditions made them this way. Others have said that man-made development uprooted the trees.

Landscape photographer Kilian Schoönberger shared some of his photos of the forest, as well as the folklore surrounding it.