The Ravne Tunnels in Visoko
- Oliver Amaryllis Mirsbach
- Nov 20, 2025
- 3 min read
Updated: Dec 24, 2025
"A sacred underworld of energy and the past"
Overview
The Ravne Tunnels form an extensive network of underground passageways near the town of Visoko in Bosnia and Herzegovina. Systematically explored since 2005 in connection with the Bosnian pyramids project, the tunnels are regarded as an integral part of an ancient complex, possibly linked to the “Pyramid of the Sun,” which is claimed to be the world’s largest man-made pyramid structure.
“An extensive network of underground passageways near Visoko.”
Construction & Finds
The tunnels are excavated in naturally cemented gravel—conglomerate—and feature carefully shaped walls, sharp angles, and side corridors, many of which appear to have been intentionally filled with loose material. During excavation, several large megalithic blocks with strange inscriptions and symbolic signs have been found, fueling the theory of an advanced civilization with both technological and spiritual knowledge.
“Carefully shaped walls, sharp angles, and side corridors—many seemingly intentionally backfilled.”
Energy & Air Quality
Perhaps the most fascinating dimension of the Ravne Tunnels is their energy. Air quality inside the system is extremely high, with measurements of negative ions far above normal—up to 20,000 ions per cubic centimeter—which is much higher than, for example, mountain air. Negative ions are associated with improved breathing, immune function, and mood, and many visitors report spontaneous improvements in sleep, concentration, and general well-being after time in the tunnels. Read the full report here
“Negative ions up to 20,000 per cubic centimeter—far above normal.”
Fields & Frequencies
Researchers and independent measurements have also indicated stable electromagnetic fields in the tunnels and the presence of a constant ultrasound frequency around 28 kHz. This frequency, together with Bovis energy readings of up to 40,000 units, has led many to view the site as a power center—a natural or man-made energy accumulator with healing properties.
“A constant ultrasound frequency around 28 kHz and Bovis readings up to 40,000.”
Visitor Experiences
Spiritual seekers and alternative practitioners flock to the site, describing intense experiences of inner calm, insight, and contact with deeper layers of consciousness. Meditation in the Ravne Tunnels is experienced as especially deep and clear, and some visitors speak of spontaneous visions and a feeling of being in touch with the Earth’s ancient intelligence.
“Meditation here is experienced as especially deep and clear.”
Meaning & Significance
In this understanding, the Ravne Tunnels appear not only as an archaeological puzzle, but as a living temple beneath the ground—created to balance human and planetary energy. They represent a meeting between the mystique of the past and today’s search for wholeness, standing as a reminder that human history and potential reach far deeper than what is immediately visible.
“A living temple beneath the ground—created to balance human and planetary energy.”
FAQ
What are the Ravne Tunnels?
An extensive network of underground passageways near Visoko, explored since 2005 and regarded as part of an ancient complex possibly linked to the “Pyramid of the Sun.”
Why do people talk about the “energy” there?
Measurements report very high negative ion levels (up to 20,000 ions/cc), stable electromagnetic fields, and a constant ultrasound frequency around 28 kHz, with Bovis readings up to 40,000.
How is the site interpreted in this view?
As more than an archaeological mystery—seen as a living underground temple intended to balance human and planetary energy.
What are they made of?
Naturally cemented gravel (conglomerate), with carefully shaped walls, sharp angles, and side corridors—many seemingly intentionally backfilled.
What do visitors experience?
Reports of inner calm, deep and clear meditation, insights, spontaneous visions, and a sense of contact with the Earth’s ancient intelligence.
What has been found inside?
Large megalithic blocks with strange inscriptions and symbolic signs.
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