Excavations have begun on the first pyramids found in Europe. There is a maze of manmade tunnels that connect the individual pyramids across the complex as well.
“The Bosnian Pyramid, Visocica Hill, is the first European pyramid to be discovered and is located in the heart of Bosnia, in the town of Visoko. The pyramid has all the elements: four perfectly shaped slopes pointing toward the cardinal points, a flat top and an entrance complex. There are also the ruins of a Medieval walled town, once the base of a Bosnian king Tvrtko of Kotromanic (1338-1391). Because of its similarities to the Pyramid of the Sun in Teotihuacan, Mexico, it has been named the “Bosnian Pyramid of the Sun” (‘Bosanska Piramida Sunca’). There are also a three smaller pyramids on the site, the Bosnian Pyramid of the Moon (‘Bosanska Piramida Mjeseca’), Bosnian Pyramid of Earth, (‘Bosanska Piramida Zemlje’) and Bosnian Pyramid of the Dragon ( ‘Bosanska Piramida Zmaja’).”
UPDATE: The validity of this find has been called into question. Read: Bosnian Pyramid No More?