<P> Many quarries naturally fill with water after abandonment and become lakes . Others are made into landfills . </P> <P> Water - filled quarries can be very deep with water, often 50 feet or more, that is often surprisingly cold . Unexpectedly cold water can cause a swimmer's muscles to suddenly weaken; it can also cause shock and even hypothermia . Though quarry water is often very clear, submerged quarry stones and abandoned equipment make diving into these quarries extremely dangerous . Several people drown in quarries each year . However, many inactive quarries are converted into safe swimming sites . </P> <Table> <Tr> <Td> </Td> <Td> Wikisource has original text related to this article:' Boscastle Waterfall and Quarry', a poem by L.E.L. </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> Wikisource has original text related to this article:' Boscastle Waterfall and Quarry', a poem by L.E.L. </Td> </Tr>

Where are large quarries located in our country