Pedra da Gávea, Rio de Janeiro, Brazil is reportedly World's largest monolith on a sea coast. It has an archaeological mystery associated with it. An inscription on the rock purportedly written in Phoenician, roughly translates as "Here Badezir, King of Tyre, Jetbaal's oldest son". Based on this inscription many feel that it is tomb of the Badzir, a Phoenician ruler of 850 BC. From a certain angle the rock has an appearance of human face (http://goo.gl/8Ax97) and it is alleged to be carved face of Badzir. The authenticity of the inscription which was discovered in early 19th century is doubted by most of the experts and it is thought to be an archaeological hoax. (More info: Wikipedia)