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How long is 4 kilometers?

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It's about one-third as tall as Maxwell Montes
In other words, the height of Maxwell Montes is 2.80 times 4 kilometers.
(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 11 km. Since Venus does not seem to have the kind of tectonic activity which gives rise to mountains on Earth, the origin of the Venusian mountain remains the subject of some dispute.
It's about four times as long as The Navy Pier
In other words, the length of The Navy Pier is 0.30 times 4 kilometers.
(a.k.a. Municipal Pier #2) (Chicago, Illinois)
The Navy Pier is 0.90 kilometers in total length. Originally named Municipal Pier #2, the pier was renamed Navy Pier in 1927 in honor of Naval personnel stationed there during World War I.
It's about four times as tall as The Three Sisters Falls
In other words, the height of The Three Sisters Falls is 0.30 times 4 kilometers.
(a.k.a. Cataratas las Tres Hermanas) (Ayacucho, Peru)
The Three Sisters Falls rise to 0.90 kilometers in height. The falls are called Three Sisters after the three large tiers over which the falls flow.
It's about four times as tall as Angel Falls
In other words, 4 kilometers is 4.09 times the height of Angel Falls, and the height of Angel Falls is 0.2440 times that amount.
(a.k.a. Parakupa-vena, a.k.a. Kerepakupai mer&) (Auyantepui, Canaima National Park, Venezuela) (total height)
Angel Falls has a total height 0.9790 kilometers. Jimmie Angel, the first person to publicize their existence outside Venezuela and the namesake of the falls, damaged his monoplane atop the falls and was forced to abandon it; it remained there until it was removed 33 years later.
It's about four times as tall as Tugela Falls
In other words, 4 kilometers is 4.220 times the height of Tugela Falls, and the height of Tugela Falls is 0.2370 times that amount.
(Royal Natal National Park, KwaZulu-Natal, South Africa)
Tugela Falls rises to 0.9480 kilometers in height. The falls are the highest in Africa and the second highest in the world.
It's about four-and-a-half times as tall as Olo'upena Falls
In other words, 4 kilometers is 4.4440 times the height of Olo'upena Falls, and the height of Olo'upena Falls is 0.2250 times that amount.
(a.k.a. Oloupena Falls) (Molokai, Hawaii)
Olo'upena Falls rise to 0.90010 kilometers in height. The isolated falls are the tallest in the United States and the fourth tallest in the world.
It's about five times as tall as Burj Dubai
In other words, 4 kilometers is 4.830 times the height of Burj Dubai, and the height of Burj Dubai is 0.2070 times that amount.
(formally Burj Khalifa, a.k.a. Dubai Tower, a.k.a. برج خليفة) (Dubai, UAE) (to roof)
Burj Khalifa, the tallest manmade structure in the world, stands 0.8280 kilometers to its roof. The tower also holds the current records for the world's highest Islamic mosque — at approximately 0.5770 kilometers on the 158th floor (of 163 floors) — and the world's tallest outdoor swimming pool — at approximately 0.2850 kilometers on the 78th floor.