I found this Video from russia, but it is in German language. I am aware there many other findings of the kind but thought worthwhile to have a look.
The remote and rugged region of the North Caucasus, in the Kabardino-Balkaria Republic of the Russian Federation, is a place of towering mountains and untamed wilderness. But in 2011, Russian speleologist Arthur Zhemukhov made an astonishing discovery on the summit of Khara-Hora. There he found a deep, narrow, vertical shaft that appeared to have been swallowed up by the earth itself. It consisted of parallel stone slabs that looked perfectly geometrical, as if they had been artificially created. The walls were straight and polished and extended 40 meters or 130 feet deep into the mountain before opening into a wide underground hall. The straight walls of this shaft were made of large megalithic blocks joined at right angles with minimal gaps. There were even large stones that looked like pillars.
Prehistoric Underground Megastructure Found in Russia - Khara Hora Shaft
The remote and rugged region of the North Caucasus, in the Kabardino-Balkaria Republic of the Russian Federation, is a place of towering mountains and untamed wilderness. But in 2011, Russian speleologist Arthur Zhemukhov made an astonishing discovery on the summit of Khara-Hora. There he found a deep, narrow, vertical shaft that appeared to have been swallowed up by the earth itself. It consisted of parallel stone slabs that looked perfectly geometrical, as if they had been artificially created. The walls were straight and polished and extended 40 meters or 130 feet deep into the mountain before opening into a wide underground hall. The straight walls of this shaft were made of large megalithic blocks joined at right angles with minimal gaps. There were even large stones that looked like pillars.
Prehistoric Underground Megastructure Found in Russia - Khara Hora Shaft
