Update - October 31st: I should know better than to trust the media. The "pyramid" seems to have been discovered by someone involved in "alternative history" see comments.
What is thought to be Europe's first pyramid has been discovered in Bosnia. The general estimate is that it was constructed by an early civilization at about 12,000 years ago, though older estimates have been suggested - one as old as 20,000 years ago. Even 12,000 is mind boggling when you consider that the ice age was only just ending. It seems to be about 100 meters tall which makes it about two thirds as high as the Great Pyramid at Giza. If all this is true (only the first stages of excavations have been started) it means that the society who built it would have had to have been surprisingly advanced for the time. Seeing how little of humanity's time on this planet has been during the known period of civilization and seeing that some of the oldest known cities are some of the most recently discovered, there are still plenty of chances for finding surprises. (Calm down crystal grippers! It's not like they have found the fiber-optic cables of Atlantis.)
There is one thing I take issue with about this story though. I have lost a link to an article about this (there is little in any of them beyond the initial discovery of the site) but one claimed that "this hill could not have been formed by nature" I will give them the benefit of the doubt and assume that they made this statement as a result of the first excavation. While I admit that the hill did look like a pyramid (after reading the article) it also looked like a pyramid shaped hill. Natural geological formations can often look like artificial constructions, leading to "discoveries" like an ark shaped rock in Turkey, an "Atlantis road" shaped line of rocks off Cuba and countless "pyramids" on Mars. The claim that nature never uses right angles may be common in the new age movement but it is not taught in geology courses and nature follows the laws of physics, not the expectations of humans.