In the Malabar region of India, a woman divorces her husband by leaving his shoes outside the door.
In ancient China a husband needed only behave reprehensibly and have his own parents' approval to legally divorce his wife. However, by law and custom, if his parents had passed away and his wife had mourned their passing, he was as good as stuck in the marriage for the rest of his life.
When traditional Eskimos divorce, no lawyers get involved if the couple has no children. The dissatisfied partner moves out of the house-oftentimes in with someone else- and life goes on.
In the early 20th century, a vending machine in Corinne, Utah, provided ready-made divorce papers. Residents would drop in 10 quarters, fill out the forms, and take them to a local law firm for final action. It's not so easy in California!