In a tiny corner of western Poland a forest of about 400 pine trees grow with a 90 degree bend at the base of their trunks – all bent northward. Surrounded by a larger forest of straight growing pine trees this collection of curved trees, or “Crooked Forest,” is a mystery.
Planted around 1930, the trees managed to grow for seven to 10 years before getting held down, in what is understood to have been human mechanical intervention. Though why exactly the original tree farmers wanted so many crooked trees is unknown.
UPDATE : After surfing more on this topic I came to know that these shapes were made intentionally. Read below comment :
This is not speculation. The trees were planted and form-curved to provide ready-made parts for furniture, specifically Thonet bentwood rockers.
As previously mentioned, there is significant cost associated with the steaming and clamping usually involved, growing the parts would be a logical labor reducer.
As also mentioned, 8-10 years after the planting of said trees, the region was overrun, and the manufacture of furniture was interrupted first by the re-tooling of plants for the war effort, and again by the invasion. Ultimately, production of the chairs began again, but after the war most of the parts for these chairs was produced in Czechoslovakia.