Ancient underground structures
Trench with the help of special equipment: excavators, various kinds of things for tractors; over short distances using manual force; trenchless technology for laying in horizontal drilling (abbr. HDD); collector.…

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The megalithic monuments of antiquity who built it?
"The first mortars having binding properties appeared before our era. Historians and researchers say that in the epoch of metals (3200-1500 BC) lime mortar was used in construction. And in…

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What to visit when traveling to Spain. Barcelona, Sevilla, Córdoba
Barcelona is well known the world for its football teams, both professional and Amateur. Largely thanks to the summer Olympic games of 1992, the city upgraded and are successfully operating…

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The great structures
This publication is dedicated to the Great constructions of the USSR and Russia, those buildings are one of its existences prove the power and might of our own country want…

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