Bridgewater Monument
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The Bridgewater Monument (grid reference SP970131) is a tower in the Chiltern Hills in England, built in 1832 in memory of Francis Egerton, 3rd Duke of Bridgewater, "the father of inland navigation". It is 108 feet tall, with 170 steps inside, designed by Sir Jeffry Wyattville in a Doric style.
It is located on the Ashridge estate in Hertfordshire, now the property of the National Trust, and overlooks the village of Aldbury and the Grand Union Canal.