It's about 85 times as tall as The Chicago Water Tower
In other words, 20 furlongs is 85.80 times the height of The Chicago Water Tower, and the height of The Chicago Water Tower is 0.0117 times that amount.(Chicago, Illinois)
The Chicago Water Tower is 0.2330 furlongs 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 95 times as long as Ha'Penny Bridge
In other words, 20 furlongs is 93.80 times the length of Ha'Penny Bridge, and the length of Ha'Penny Bridge is 0.0107 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 0.2130 furlongs in total length. Over 30,000 pedestrians cross the breach each day.
It's about one-one-hundredth as long as The Grand Canyon
In other words, 20 furlongs is 0.00902 times the length of The Grand Canyon, and the length of The Grand Canyon is 111 times that amount.(a.k.a. Gran Cañón) (Arizona) (Colorado River miles measure)
The Grand Canyon has a total length of 2,220 furlongs along the course of the Colorado River at its bottom. Having opened in early 2007, the Grand Canyon Skywalk allows tourists to stand on a horseshoe-shaped glass walkway 5.470 furlongs above the floor of Granite Gorge.
It's about 150 times as long as Baseball base distances
In other words, 20 furlongs is 146.670 times the length of Baseball base distances, and the length of Baseball base distances is 0.006818 times that amount.(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 0.136360 furlongs. 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 200 times as long as a Cricket Pitch
In other words, the length of a Cricket Pitch is 0.005 times 20 furlongs.(per Marylebone Cricket Council / International Cricket Council Law #6)
The length of a cricket pitch, from one bowling crease to the other, is 0.10 furlongs. The wickets at either end of the pitch stand 0.0035791 furlongs tall including the bails.
It's about 200 times as long as a Bowling Lane
In other words, 20 furlongs is 210.03 times the length of a Bowling Lane, and the length of a Bowling Lane is 0.0047612 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 0.095224 furlongs. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.
It's about 250 times as tall as The Hollywood Sign
In other words, the height of The Hollywood Sign is 0.0037 times 20 furlongs.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 0.075 furlongs tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.