It's about as long as Baseball base distances
(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 120 spans. 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-and-one-third times as long as a Cricket Pitch
In other words, 120 spans is 1.36364 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 0.733331 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 88 spans. The wickets at either end of the pitch stand 3.149610 spans tall including the bails.
It's about one-and-two-fifths times as long as a Bowling Lane
In other words, 120 spans is 1.432 times the length of a Bowling Lane, and the length of a Bowling Lane is 0.69832 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 83.7970 spans. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about two-thirds as long as Ha'Penny Bridge
In other words, 120 spans is 0.639 times the length of Ha'Penny Bridge, and the length of Ha'Penny Bridge is 1.56 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 188 spans in total length. Over 30,000 pedestrians cross the breach each day.
It's about three-fifths as tall as The Chicago Water Tower
In other words, 120 spans is 0.585 times the height of The Chicago Water Tower, and the height of The Chicago Water Tower is 1.71 times that amount.(Chicago, Illinois)
The Chicago Water Tower is 205 spans 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 three-fifths as tall as The Arc de Triomphe
In other words, 120 spans is 0.56 times the height of The Arc de Triomphe, and the height of The Arc de Triomphe is 1.8 times that amount.(Paris, France)
The Arc de Triomphe stands 210 spans 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-and-four-fifths times as tall as The Hollywood Sign
In other words, 120 spans is 1.8 times the height of The Hollywood Sign, and the height of The Hollywood Sign is 0.56 times that amount.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 66 spans tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.