In the december of 1999 the notable cave researcher Gleb Zyrianov discovered a new system of underground passages in a quarry. It was the first time when a completely untouched old limestone quarry has been found near Moscow. The total length of corridors is about 2 km. Old tools, lanterns and other artifacts were found there. After the initial research that part of a quarry has been closed.
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| The same high and wide galleries looks the same as 100 years ago. | Mining was held using the gunpowder, so roof holding has been installed every meter. Later some parts of the roof holding system collapsed. | |
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| They fixed falling slabs with wooden wedges. | Some logs can not hold so large pressure. | |
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| There are strange stalactites on some logs. | There is a lot of calcite on walls. | |
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| Old lamp. | Old crowbar, forgotten in a ceiling. | |
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| In spring time a part of the system is flooded and then... | ... the floor is left covered with the thick layer of clay. | |