Have you ever heard about square trees? Only in Panama, a tourist place known as “El Valle de Antón”, you can find these kinds of trees.
Physically, the trees are not square. They are called "square trees" because the base of the trunk is totally square. If you measure with a measuring tape each side of the trunk, you get the same dimension. In addition, as a curious fact, the inner rings of the tree, which are used to tell the age of a tree that grows one each year, are square too.