Poland's Mysterious Crooked Forest: 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. It is surrounded by a larger forest of straight growing pine trees.
Ash Tree - Druids wands were made of ash twigs. It also has healing properties. Weak-limbed children were passed through split ash trees which were then bound up. If the tree grew straight, the child would as well. -- Another cool tree MM.