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The Odessa Catacombs are a network of tunnels under Odessa, Ukraine and its surrounding region, that are mostly the result of stone mining, at first, and then smuggling. The Catacombs are on three levels and reach a depth of 60 metres below sea level. In the 19th-century, most houses in Odesssa were built of limestone that was mined nearby. These mines were abandoned and later used, and widened, by local smugglers, creating a labyrinth of underground tunnels beneath Odessa. ==Description== thumb The approximate topography of the Odessa underground labyrinth is unknown. The catacombs have not been fully mapped. Most (95–97%) of the catacombs are former sandstone multilevel mines, from which stone was extracted to construct the city above. The remaining catacombs (3-5%) are either natural cavities or were excavated for other purposes such as sewerage. As of 2012, there are more than 1000 known entrances to the tunnels.〔 Only one small portion of the catacombs is open to the public, within the "Museum of Partisan Glory" in Nerubayskoye, north of Odessa.〔(Catacombs ), Catacomb Museum - Museum of Partisan Glory, retrieved 13 December 2014〕 Other caves attract extreme tourists, who explore the tunnels despite the dangers involved. Such tours are not officially sanctioned because the catacombs have not been fully mapped and the tunnels themselves are unsafe. There have been incidents of people becoming lost in the tunnel network, and dying of dehydration or rockfalls.〔(Emercom ceases search for a student missing in Odessa catacombs ) 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Odessa Catacombs」の詳細全文を読む スポンサード リンク
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