It's about nine times as tall as The Petronas Twin Towers
In other words, 4 kilometers is 8.8520 times the height of The Petronas Twin Towers, and the height of The Petronas Twin Towers is 0.1130 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 0.45190 kilometers 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 0.1150 kilometers deep.
It's about ten-and-a-half times as tall as The Empire State Building
In other words, 4 kilometers is 10.4980 times the height of The Empire State Building, and the height of The Empire State Building is 0.095256 times that amount.(New York City, New York) (to top of building)
The Empire State Building stands 0.381010 kilometers 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 twelve-and-a-half times as tall as The Eiffel Tower
In other words, the height of The Eiffel Tower is 0.0813 times 4 kilometers.(a.k.a. La Tour Eiffel) (Paris, France) (to flagpole peak)
The Eiffel Tower stands 0.3240 kilometers 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 0.037 kilometers or less.
It's about thirteen-and-a-half times as long as The QE2
In other words, the length of The QE2 is 0.0735 times 4 kilometers.(a.k.a. RMS Queen Elizabeth 2)
The QE2 has a total length of 0.2940 kilometers. During its voyaging lifetime from 1969 through 2008, it travelled more than 9.6 million km, the furthest cumulative distance by any ship in modern history.
It's about seventeen-and-a-half times as tall as The Golden Gate Bridge
In other words, the height of The Golden Gate Bridge is 0.0568 times 4 kilometers.(San Francisco, California and Marin County, California) (height above water)
The height of each tower of Golden Gate Bridge is 0.2270 kilometers 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 twenty times as tall as The Space Needle
In other words, 4 kilometers is 21.70 times the height of The Space Needle, and the height of The Space Needle is 0.0461 times that amount.(Seattle, Washington) (to aircraft warning beacon at peak)
Built for a 1962 World's Fair, the Space Needle stands 0.1840 kilometers 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 one-twentieth as long as The Panama Canal
In other words, the length of The Panama Canal is 22 times 4 kilometers.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 88 kilometers in length. Ships passing through the Canal are raised (and then lowered) 0.026 kilometers above sea level through the lock-and-dam system.