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Visočica hill ('Bosnian Pyramid of the Sun')

Location	Above the town of Visoko, central Bosnia, Bosnia and Herzegovina
Conventional date	Natural hill of tilted Miocene sedimentary rock; a medieval fortified town stood on its summit.
Alternative date proposals	Semir Osmanagić (from 2005): Pyramid complex tens of thousands of years old, with tunnels [3]
What is measured	Layered sandstones, clays and conglomerates, tilted and fractured by tectonics. [1]

The hill's triangular faces are striking. Proponents run excavations and a tourist park; geologists who have visited describe a natural flatiron-type landform.

Claims about this site

Claim	Status	Verdict
The hills near Visoko, Bosnia, are ancient pyramids	Leading Edge	Open question: geologists describe natural hills; no construction dated

Sources

Schoch, R. M. The Bosnian Pyramids (account of his 2006 field visit; geology of Visočica). https://www.robertschoch.com/bosnia.html critique
Statement by European archaeologists on the Visoko 'pyramid' project (December 2006; PDF copy hosted by R. Schoch). https://robertschoch.com/articles/schoch_eaa_statement.pdf critique
Smithsonian Magazine (2009). The mystery of Bosnia's ancient pyramids (reporting on Osmanagić's project and both sides). https://www.smithsonianmag.com/history/the-mystery-of-bosnias-ancient… background

Dates are summarised in our own words from the sources listed. Conventional and alternative dates are both reported; "measured" lists only dated or documented findings. Methodology.