Isanbul's Archaeological Museum has lots of cool items from the ancient and classical periods (plundered, no doubt, from the many lands that were once under the control of the Ottoman Empire), but one of the highlights is this, "The World's Oldest Peace Treaty." It's about 3,500 years old and was between the Egyptians and the Hittites. Other cool holdings of this museum include the world's oldest surviving love poem and an ancient recipe to cure impotence (which requires saliva from an erect bull and other seemingly hard-to-find ingredients).