Ladybower Reservoir In Derbyshire, England

a Ladybower Reservoir -not the gateway to hell, but only a funnel-shaped spillway of the reservoir Ledibauer (Ladybower) in the English county of Derbyshire.

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The Diavik Diamond Mine is a diamond mine in the North Slave Region of the Northwest Territories, Canada, about 300 kilometres miles) north of Yellowknife. It has become an important part of the regional economy

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The Great Blue Hole is the most popular dive destination in Belize. This massive hole under the water is near the Lighthouse Reef and creates a perfect circle of deep blue water. The water is 407 feet deep. It's breathtaking.

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Kimberley Big Hole – South Africa, Apparently the largest ever hand-dug excavation in the world, this 1097 meter deep mine yielded over 3 tons of diamonds before being closed in

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Located at the Monticello Dam at Lake Berryessa in Northern California, this gigantic drain acts as the lake's spillway.

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Unbelievable Facts Of The World. Glory Hole - Monticello Dam - A glory hole is used when a dam is at full capacity and water needs to be drained from the resevoir.

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One of the biggest holes on earth--Bingham Canyon Mine, Utah

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Unbelievable Facts Of The World. Monticello Dam in CA

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Bingham Canyon Mine, Utah - This is supposedly the largest man-made excavation on earth. Extraction began in 1863 and still continues today, the pit increasing in size constantly. In its current state the hole is mile deep and miles wide.

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In It's current state the hole is of a mile deep and 25 miles wide

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The Great Blue Hole, Belize. One of the world's most famous dive sites, the submarine sink-hole is over 300 metres ft) across and 124 metres ft) deep and lies near the center of Lighthouse Reef, 70 kilometres mi) off the coast of Belize.

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Mirny Mine is an open pit diamond mine located in Mirny, Eastern Siberia, Russia. The mine is 525 meters deep in the world) and has .

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The world’s biggest hole, Mirny Diamond Mine, is located in Russia

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World’s Biggest Diamond Mine at Mirna, Eastern Siberia, Russia. The mine is 525 meters ft) deep and has a diameter of m ft).