It's about 150,000 times as tall as The Arc de Triomphe
In other words, the height of The Arc de Triomphe is 0.00000770 times 6,400 kilometers.(Paris, France)
The Arc de Triomphe stands 0.049 kilometers tall. France's Tomb of the Unknown Soldier from the First World War lies beneath the arch and is commemorated by the first eternal flame to have been lit in modern European history.
It's about 150,000 times as tall as The Chicago Water Tower
In other words, 6,400 kilometers is 136,000 times the height of The Chicago Water Tower, and the height of The Chicago Water Tower is 0.000007350 times that amount.(Chicago, Illinois)
The Chicago Water Tower is 0.0469 kilometers tall. The tower's architecture was one source of inspiration behind the design of White Castle fast-food restaurants beginning with "Building Number 8," a prefabricated structure built in Minneapolis, Minnesota in 1936.
It's about 150,000 times as long as Ha'Penny Bridge
In other words, 6,400 kilometers is 149,000 times the length of Ha'Penny Bridge, and the length of Ha'Penny Bridge is 0.000006710 times that amount.(a.k.a. Droichead na Leathphingine, a.k.a. Liffey Bridge, a.k.a. Droichead na Life, f.k.a. Wellington Bridge) (Quay of Bachelors Walk, Temple Bar Neighborhood, Dublin, Ireland)
The Ha'Penny Bridge, crossing the River Liffey in Dublin, measures 0.0429 kilometers in total length. Over 30,000 pedestrians cross the breach each day.
It's about 250,000 times as long as Baseball base distances
In other words, 6,400 kilometers is 233,300 times the length of Baseball base distances, and the length of Baseball base distances is 0.00000428630 times that amount.(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 0.027432 kilometers. While second and home base are located upon the corners of the 27.432 sq. m area created by the bases, first and third base are placed within that square, to better allow the umpires to judge whether a ball is fair or foul.
It's about 300,000 times as long as a Cricket Pitch
In other words, 6,400 kilometers is 318,142 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 0.000003143250 times that amount.(per Marylebone Cricket Council / International Cricket Council Law #6)
The length of a cricket pitch, from one bowling crease to the other, is 0.0201168 kilometers. The wickets at either end of the pitch stand 0.00072 kilometers tall including the bails.
It's about 350,000 times as long as a Bowling Lane
In other words, 6,400 kilometers is 334,100 times the length of a Bowling Lane, and the length of a Bowling Lane is 0.00000299310 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 0.019156 kilometers. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about 450,000 times as tall as The Hollywood Sign
In other words, the height of The Hollywood Sign is 0.00000230 times 6,400 kilometers.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 0.015 kilometers tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.