Bosnian Valley of the Pyramids represents the biggest complex of pyramidal structures in the World. It consists of Bosnian Pyramid of the Sun (with its height of over 220 meters is bigger than Cheops Pyramid), Bosnian Pyramid of the Moon (190 meters), Pyramid of Bosnian Dragon (90 meters), Temple of Mother Earth and Pyramid of Love.Pyramids of Sun, Moon and Dragon form perfect equilateral triangle with 2.170 meters distance between their tops. All pyramids are oriented toward the cosmic North. Fifty-five leading scientists from 13 countries concluded during First International Scientific Conference on Bosnian Valley of the Pyramids in August 2008 that Bosnian pyramids are archaeological phenomenon and further scientific investigation is needed.Geo-radar and thermal analysis confirmed existence of passageways and chambers inside the pyramids. Sample analysis of rectangular blocks from the Bosnian pyramid of the Sun at Institutes for materials in Bosnia, Italy and France have confirmed that they were man-made as concrete blocks of exceptional quality. According to the radiocarbon datings (Poland, 2011) and pedological analysis (Bosnia, 2006) pyramids are built over 10.000 years ago. Underground labyrinth is tens of kilometers long and consists of passageways, chambers and artificial lakes.Anthropologist Dr.sci. Semir Osmanagic established a hypothesis about the pyramids and underground tunnels existence in April 2005 and started investigation. Non-profit “Archaeological Park: Bosnian Pyramid of the Sun” Foundation was established in 2006. and continued research. Bosnian Valley of the Pyramids has become a most active archaeological site in the world and attracts tens of thousands of tourists every year in Visoko, Bosnia-Herzegovina.http://piramidasunca.ba/eng/pyramid.html