It's about eight-and-a-half times as tall as The Eiffel Tower
In other words, 451 ropes is 8.490 times the height of The Eiffel Tower, and the height of The Eiffel Tower is 0.1180 times that amount.(a.k.a. La Tour Eiffel) (Paris, France) (to flagpole peak)
The Eiffel Tower stands 53.10 ropes tall, including its flagpole. The Tower is the largest structure in Paris as most other buildings are governed by a zoning restriction limiting them to a height of 6.07 ropes or less.
It's about nine-and-a-half times as long as The QE2
In other words, 451 ropes is 9.350 times the length of The QE2, and the length of The QE2 is 0.1070 times that amount.(a.k.a. RMS Queen Elizabeth 2)
The QE2 has a total length of 48.20 ropes. During its voyaging lifetime from 1969 through 2008, it travelled more than 1,570,000,000 ropes, the furthest cumulative distance by any ship in modern history.
It's about one-tenth as tall as Olympus Mons
In other words, the height of Olympus Mons is 10 times 451 ropes.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 4,400 ropes. The mountain has been known to astronomers since the nineteenth century because it is tall enough to rise above Mars' frequent dust storms.
It's about twelve times as tall as The Golden Gate Bridge
In other words, 451 ropes is 12.10 times the height of The Golden Gate Bridge, and the height of The Golden Gate Bridge is 0.0826 times that amount.(San Francisco, California and Marin County, California) (height above water)
The height of each tower of Golden Gate Bridge is 37.20 ropes above the surface of the San Francisco Bay. One of the key designers of the bridge, Charles Ellis, had no engineering degree when he began working on the project, but would later go on to write what became a standard textbook on structural engineering, and would ultimately be forced to complete his calculations on the bridge by working without pay for five months.
It's about fifteen times as tall as The Space Needle
In other words, 451 ropes is 14.90 times the height of The Space Needle, and the height of The Space Needle is 0.0671 times that amount.(Seattle, Washington) (to aircraft warning beacon at peak)
Built for a 1962 World's Fair, the Space Needle stands 30.20 ropes tall. With a track-and-wheel design inspired by railroad mechanics and a precisely-configured balance, the restaurant near the top of the space needle requires just a 1.5 hp motor to rotate at speeds of about 0.053 kph (0.033 mph).
It's about sixteen times as tall as St. Paul's Cathedral
In other words, 451 ropes is 15.80 times the height of St. Paul's Cathedral, and the height of St. Paul's Cathedral is 0.0633 times that amount.(London, England, United Kingdom)
St. Paul's Cathedral measures 28.50 ropes to its peak. The southwest tower of the Cathedral contains the bell known as "Great Paul," which is the largest bell in Great Britain at 15,000 kg (16.5 tons), outweighing the more iconic Big Ben bell by about 3,000 kg (3 tons).
It's about sixteen times as tall as The Washington Monument
In other words, 451 ropes is 16.240 times the height of The Washington Monument, and the height of The Washington Monument is 0.061576 times that amount.(Washington, D.C.)
The Washington Monument measures 27.7710 ropes tall, with some discrepancy due to the fact that the Monument's base is slightly below the surrounding ground. Interrupted in its construction by the American Civil War, it was almost 36 years between groundbreaking and the completion of construction.