It's about one-tenth as long as a Bowling Lane.
In other words, 2.10 meters is 0.109630 times the length of a Bowling Lane, and the length of a Bowling Lane is 9.12160 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 19.156 m. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about one-tenth as long as a Cricket Pitch.
In other words, 2.10 meters is 0.104390 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 9.579460 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 20.11680 meters. The wickets at either end of the pitch stand 0.720 meters tall including the bails.
It's about one-fifteenth as long as Baseball base distances.
In other words, 2.10 meters is 0.076553 times the length of Baseball base distances, and the length of Baseball base distances is 13.063 times that amount.(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 27.432 m. 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 one-twentieth as tall as The Chicago Water Tower.
In other words, 2.10 meters is 0.0448 times the height of The Chicago Water Tower, and the height of The Chicago Water Tower is 22.30 times that amount.(Chicago, Illinois)
The Chicago Water Tower is 46.9 m 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 one-twenty-fifth as tall as The Arc de Triomphe.
In other words, the height of The Arc de Triomphe is 23 times 2.10 meters.(Paris, France)
The Arc de Triomphe stands 49 m 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 one-twenty-fifth as tall as Nelson's Column.
In other words, 2.10 meters is 0.04067 times the height of Nelson's Column, and the height of Nelson's Column is 24.590 times that amount.(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
Nelson's Column measures 51.64 m from the first step of the pedestal's base to the top of the statue's hat. While the London tower is the tallest, there are at least eight other monuments to Admiral Horatio Nelson, 1st Viscount Nelson, 1st Duke of Bronté throughout England, Scotland, Ireland, Canada, and Barbados.
It's about one-twenty-fifth as tall as The Leaning Tower of Pisa.
In other words, the height of The Leaning Tower of Pisa is 26.90 times 2.10 meters.(a.k.a. The Tower of Pisa, a.k.a. Torre pendente di Pisa) (Pisa, Italy) (height along center axis)
The Leaning Tower of Pisa stands 56.4 m tall along the angle of its lean. In May of 2008, in an successful effort to stabilize the tower, 70 tonnes of earth were removed from the tower's base on the side opposite the lean.