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The largest prehistoric earthen-work in the New World provides nice views over the whole historic site. An easy 154 steps will take you to the top of the 100 ft (30 m) mound, where you can see central St Louis including the impressive Gateway Arch about 7 mi (11 km) away. Completely man-made, Monks Mound contains 22 million cubic feet (625,000 m3) of dirt. If it were made of ice cream, it would be large enough to give every person in the United States a half gallon.