It's about as long as The QE2
It's about nine-tenths as tall as The Eiffel Tower
In other words, 643 cubits is 0.907 times the height of The Eiffel Tower, and the height of The Eiffel Tower is 1.1 times that amount.(a.k.a. La Tour Eiffel) (Paris, France) (to flagpole peak)
The Eiffel Tower stands 709 cubits 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 80.90 cubits or less.
It's about three-fourths as tall as The Empire State Building
In other words, 643 cubits is 0.77158 times the height of The Empire State Building, and the height of The Empire State Building is 1.296 times that amount.(New York City, New York) (to top of building)
The Empire State Building stands 833.360 cubits to its architectural peak. The spire emerging from the top of the building was originally intended to be a mooring mast for blimps whose passengers could disembark onto a landing platform on the 102
It's about one-and-three-tenths times as tall as The Golden Gate Bridge
In other words, 643 cubits is 1.3 times the height of The Golden Gate Bridge, and the height of The Golden Gate Bridge is 0.769 times that amount.(San Francisco, California and Marin County, California) (height above water)
The height of each tower of Golden Gate Bridge is 497 cubits 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 two-thirds as tall as The Petronas Twin Towers
In other words, 643 cubits is 0.6505 times the height of The Petronas Twin Towers, and the height of The Petronas Twin Towers is 1.537 times that amount.(a.k.a. Menara Berkembar Petronas, a.k.a. Petronas Towers) (Kuala Lumpur, Malaysia) (to spire)
Each of the Petronas Towers stands 988.40 cubits to their spires. Holding the record as the tallest buildings in the world from 1998 to 2004, the towers continue to hold the record for the deepest foundation barrettes — up to 251.50 cubits deep.
It's about one-and-three-fifths times as tall as The Space Needle
In other words, 643 cubits is 1.6 times the height of The Space Needle, and the height of The Space Needle is 0.625 times that amount.(Seattle, Washington) (to aircraft warning beacon at peak)
Built for a 1962 World's Fair, the Space Needle stands 402 cubits 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 three-fifths as tall as The Shanghai World Financial Center
In other words, 643 cubits is 0.598 times the height of The Shanghai World Financial Center, and the height of The Shanghai World Financial Center is 1.67 times that amount.(上海环球金融中 上海環球金融中心, Shànghǎi huánqiú jīnróng zhōngxīn) (a.k.a. SWFC) (Shanghai, China) (to spire)
The Shanghai World Financial Center is 1,080 cubits tall to its roof. It is home to both the world's highest hotel (on its 79th through 93rd floors) and the world's tallest observation deck (on its 100