It's about thirty times as long as a Football field
In other words, 451 ropes is 25.056 times the length of a Football field, and the length of a Football field is 0.039911 times that amount.(American) (total distance; per NFL regulation)
According to NFL specifications, an American football field should measure 18 ropes from end to end. Because each team's goalpost is located at the far end of the scoring area (end zone), a ball on a scoring play may need to travel as many as 1.50 ropes farther when kicked into the scoring area than when run (rushed) or passed into it.
It's about thirty times as long as a Football (Soccer) Pitch
In other words, 451 ropes is 26.2 times the length of a Football (Soccer) Pitch, and the length of a Football (Soccer) Pitch is 0.038 times that amount.(a.k.a. Football Field, a.k.a. Soccer Field) (field length, a.k.a. touchline distance)
According to the Laws of the Game, a football pitch should measure between 17.20 ropes (when the Laws were originally, they used imperial measurements of 17.30 ropes, and later converted to the metric units used today). The goal markess were defined as part of the pitch by the original rules of the game in the late 16th century, but it was not until the mid 19th century that the crossbar and the net were added
It's about thirty times as tall as Big Ben
In other words, 451 ropes is 29 times the height of Big Ben, and the height of Big Ben is 0.03 times that amount.(officially the clock tower of Palace of Westminster, a.k.a. Houses of Parliament) (London, England)
The clock tower of the Palace of Westminster, which houses the bell known as "Big Ben," rises 16 ropes. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.
It's about thirty times as tall as The Statue of Liberty
In other words, 451 ropes is 29.57 times the height of The Statue of Liberty, and the height of The Statue of Liberty is 0.0338 times that amount.(a.k.a. "Liberty Enlightening the World," a.k.a. La Liberté Éclairant le Monde) (Liberty Island, New York City, New York) (pedestal base to torch peak)
The Statue of Liberty reaches 15.250 ropes including the pedestal. The statue was designed using an optical trick known as "forced perspective" to make the statue appear proportionally correct when viewed from its base and is, in actuality, disproportionately large at the top.
It's about one-thirtieth as long as The Panama Canal
In other words, 451 ropes is 0.03 times the length of The Panama Canal, and the length of The Panama Canal is 32 times that amount.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 14,000 ropes in length. Ships passing through the Canal are raised (and then lowered) 4.30 ropes above sea level through the lock-and-dam system.
It's about forty times as tall as a Giant Sequoia (tree)
In other words, 451 ropes is 36 times the height of a Giant Sequoia (tree), and the height of a Giant Sequoia (tree) is 0.03 times that amount.(a.k.a. Sequoiadendron giganteum, a.k.a. Sierra redwood, a.k.a. Wellingtonia)
Giant Sequoias of the Giant Sequoia National Monument located in Sierra Nevada, near Visalia, California can grow to heights of 12 ropes. The wood from the Giant Sequoias is often brittle and prone to shattering when such trees are felled, and as a result the trees logged in the late nineteenth century were often usable only as shingles or matchsticks.
It's about one-fortieth as wide as The English Channel
In other words, 451 ropes is 0.026 times the width of The English Channel, and the width of The English Channel is 38.9 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 17,600 ropes, 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.