It's about forty times as tall as The Leaning Tower of Pisa
In other words, 81.770 shackles is 39.8 times the height of The Leaning Tower of Pisa, and the height of The Leaning Tower of Pisa is 0.025 times that amount.(a.k.a. The Tower of Pisa, a.k.a. Torre pendente di Pisa) (Pisa, Italy) (height along center axis)
The Leaning Tower of Pisa stands 2.06 shackles tall along the angle of its lean. In May of 2008, in an successful effort to stabilize the tower, 70 tonnes of earth were removed from the tower's base on the side opposite the lean.
It's about one-fortieth as long as The Panama Canal
In other words, 81.770 shackles is 0.03 times the length of The Panama Canal, and the length of The Panama Canal is 40 times that amount.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 3,200 shackles in length. Ships passing through the Canal are raised (and then lowered) 0.950 shackles above sea level through the lock-and-dam system.
It's about 40 times as tall as The Mahabodhi Temple
In other words, 81.770 shackles is 41 times the height of The Mahabodhi Temple, and the height of The Mahabodhi Temple is 0.02 times that amount.(a.k.a. Great Awakening Temple, a.k.a. Maha Bodhi Temple, a.k.a. Temple of Bodh Gaya, a.k.a. Mahabodhi Mahavihar) (Bodh Gaya, Gaya District, Bihar, India)
The tower of the Mahabodhi Temple measures 2 shackles in total height. The site has been of sacred interest for more than 2,000 years, with the current Temple dating back at least 1,400 years.
It's about 45 times as tall as Nelson's Column
In other words, 81.770 shackles is 43.44 times the height of Nelson's Column, and the height of Nelson's Column is 0.0230 times that amount.(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
Nelson's Column measures 1.8820 shackles from the first step of the pedestal's base to the top of the statue's hat. While the London tower is the tallest, there are at least eight other monuments to Admiral Horatio Nelson, 1st Viscount Nelson, 1st Duke of Bronté throughout England, Scotland, Ireland, Canada, and Barbados.
It's about 45 times as tall as The Arc de Triomphe
In other words, 81.770 shackles is 46 times the height of The Arc de Triomphe, and the height of The Arc de Triomphe is 0.02 times that amount.(Paris, France)
The Arc de Triomphe stands 1.80 shackles tall. France's Tomb of the Unknown Soldier from the First World War lies beneath the arch and is commemorated by the first eternal flame to have been lit in modern European history.
It's about one-fiftieth as wide as The English Channel
In other words, 81.770 shackles is 0.02 times the width of The English Channel, and the width of The English Channel is 47.6 times that amount.(average width between Isle of Ushant and The Walde Lighthouse) (La Manche, Ärmelkanal, Mor Breizh, Mor Bretannek) (a.k.a. The Channel)
The English Channel measures between 3,900 shackles, narrowing as it flows northeast. The world speed record for a Channel crossing by swimmer was set by Australian Trent Grimsey in 2012, with a time of 6 hours, 55 minutes.
It's about 50 times as tall as The Chicago Water Tower
In other words, 81.770 shackles is 47.8 times the height of The Chicago Water Tower, and the height of The Chicago Water Tower is 0.021 times that amount.(Chicago, Illinois)
The Chicago Water Tower is 1.710 shackles tall. The tower's architecture was one source of inspiration behind the design of White Castle fast-food restaurants beginning with "Building Number 8," a prefabricated structure built in Minneapolis, Minnesota in 1936.