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 four more ancient structures on the site, the Bosnian Pyramid of the Moon ('Bosanska Piramida Mjeseca'), Bosnian Pyramid of the Dragon ( 'Bosanska Piramida Zmaja'), Bosnian Pyramid of the Love ('Bosanska Piramida Ljubavi') and Temple of the Earth, ('Hram Zemlje').
'We have already dug out stone blocks which I believe are covering the pyramid', said Semir (Sam) Osmanagic, a Bosnian American archaeologist who has spent the last 15 years studying the pyramids of Latin America. 'We found a paved entrance plateau and discovered underground tunnels'.....
Latest discovery proves pyramid theory
A press conference held earlier today (Sunday) at the Bosnian Pyramid of the Moon puts “beyond doubt” the existence of a pyramid at the site, says the Archeological Park: Bosnian Pyramid of the Sun (APBPS).
The Pljesevica Hill was previously named the Bosnian Pyramid of the Moon by the APBPS Foundation. Experts from the Foundation have now revealed the discovery of a vertical wall that forms part of the Pyramid of The Moon.
Lamia el-Hadidi (Conservation Specialist, Egypt) assumes that the wall forms part of a tomb belonging to the pyramid. She pointed out that the wall is clearly manmade, comprising blocks that have been cut by man, refined and used to build this vertical wall.
Prof.Dr.Ric.Geol. Dario Andretta, chairman of the Humanitarian University for the Multidisciplinary International Culture (Rome), announced that this evidence puts beyond doubt the existence of a true pyramid at this site.
Experts from APBPS expect to have further announcements about the nature of the wall that has been discovered in the next two to three days. Excavations will now continue to take place to the left, right and above the wall. The team has also discovered steps which they say probably lead into the tomb.
Andretta has also announced that more experts from across Italy will be coming to join Bosnians on the site to be part of largest current international archeological project.
It is said that the discovery of the entrance at the Bosnian Pyramid of the Moon proves beyond doubt that this is a true pyramid.
Local people also reported hearing echoes
 
Local Bosnian Enver Buza, who was at Visocica during the war, witnessed a strange phenomenon at the Bosnia Pyramid of the Sun. When a bomb exploded near the pyramid, he heard the explosion as if it had travelled through the mountain itself. He said, “It sounded like the explosion of mines very deep below the surface and as if it had travelled through a series of tunnels.” As a result, he wondered if there were tunnels inside the mountain and, when he mentioned this later to colleague, he found out that children in the area used to explore the mountainous area through a series of tunnels just north of the pyramid – while other local children claim to have explored tunnels in the pyramid itself. a Tunnels have been discovered during the excavation work. The maze of tunnels is several kilometres long including junctions. Similar tunnels and chambers have been found in pyramidal complexes in Egypt and Mexico.