Ravne Underground Labyrinth

For us it was a great experience not only to walk through this tunnel system, but also for up to 30 minutes in it. to litter in a special place. The oxygen content is 20%, has a high number of negative ions (18,400 per cm3)
Also noteworthy are the Bovis units from 20,000 to 40,000

The tunnels were created over 30,000 years ago.
The pyramids of Visoko are with this very extensive tunnel system. connected.
When Dr. Sam Osmanagich discovered the pyramid of the sun in 2006, he went on a search for underground tunnel systems at the same time. This is an indication of the authenticity of pyramids - there are always underground tunnels in or around them all over the world. Locals told of an entrance to cave passages. These have been used as winter storage for fruit and potatoes since childhood. And yes! Explorations and first excavations have shown that there is an extensive tunnel system here! Scientists, archaeologists and geologists have been making pilgrimages in large numbers to Visoko to the Ravne tunnel.

Very interesting facility. recommendation from me.

Research on the Bosnian pyramids began around 2005 and continues to this day.
Ancestors of the Illyrians, who probably settled in present-day Bosnia-Herzegovina 27,000 years ago, are said to have built the pyramids. Kilometers of tunnel systems connecting all the pyramids were discovered beneath the pyramids – including wooden remains dating back as much as 36,000 years.