I search on video.google.com the keyword “pyramid” sorted by update in last month with duration 20+mins nad i found interesting video uploaded 7 days ago from Semir Osmanagič who is talking about pyramids and giant stone balls which is known that they exist only in Costa Rica.

This presentation is a must see, simply because he claims that Bosnian Pyramids are the biggest on earth. He personally presents great footage of digging excavations with explanations from his own mouth.

“Copied from video description:
The existence of a monumental pyramidal complex in Central Bosnia, stone spheres and tunnel system (town of Visoko) has caught the world by surprise and shook the global scientific community, because it may require a part of world history to be rewritten. Semir Sam Osmanagich discovered these amazing structures in 2005, and an Egyptian team of experts confirmed in September 2007 that these structures in Visoko were man-made. With a total of five huge stone structures, perfectly oriented, followed by the network of the underground tunnels it represent a sensational archaeological discovery, and it serves as a testimony about one civilization that we know nothing about….. Sam is presently the Chairman of the Board of Directors of the ‘Archaeological Park: Bosnian Pyramid of the Sun Foundation’, Sarajevo, Bosnia and Herzegowina, and is the author of ten books about ancient civilizations (The Mayan World, Peruvian, Mexican, and Pacific civilizations) published internationally. His PhD Thesis was on The Maya at the University of Sarajevo, Bosnia……http://www.piramidasunca.ba/en“

MEGALITHOMANIA 2008: Semir Sam Osmanagich – The Bosnian Valley of the Pyramids

I have been on tallest hill and i did not have a much time to see all the hills around.
I will not claim anything , i took very few photos, here are the 3 that are interesting.