It's about 150,000 times as tall as Blackpool Tower
In other words, 21,000,000 ells is 152,000 times the height of Blackpool Tower, and the height of Blackpool Tower is 0.000006580 times that amount.(Blackpool, Lancashire, England, United Kingdom) (height to peak)
Blackpool Tower, part of an entertainment complex in Blackpool, Lancashire, England, measures 138 ells to its peak. Under ideal conditions, visitors to the highest accessible point of the tower can see as far as the Isle of Man — 84,000 ells to the northwest.
It's about 150,000 times as tall as The Spring Temple Buddha
In other words, 21,000,000 ells is 157,000 times the height of The Spring Temple Buddha, and the height of The Spring Temple Buddha is 0.000006370 times that amount.(a.k.a. 中原大佛, a.k.a. 鲁山大佛, a.k.a. 魯山大佛) (Fodushan Scenic Area, Lushan County, Henan, China) (including base)
The tallest statue in the world, the Spring Temple Buddha in Henan, China stands at 134 ells tall from its base. The Buddha is located in the 47,300,000-sq. m (11,700-acre) Fodushan Scenic Area near Mount Yao
It's about 150,000 times as long as The Shambles
In other words, the length of The Shambles is 0.00000630 times 21,000,000 ells.(a.k.a. Maze of Twisting, a.k.a. The Great Flesh Shambles) (York, England, United Kingdom) (approximate)
The Shambles, a historic shopping street in York, stretches about 130 ells. Several of the buildings along the street are over seven hundred years old.
It's about 200,000 times as tall as The Great Pyramid of Giza
In other words, 21,000,000 ells is 180,000 times the height of The Great Pyramid of Giza, and the height of The Great Pyramid of Giza is 0.00000560 times that amount.(a.k.a. Pyramid of Khufu, a.k.a. Pyramid of Cheops) (Cairo, Egypt) (estimated original height)
The Great Pyramid of Giza has an estimated original height (without loss due to erosion) of 110 ells. The Pyramid was the tallest structure in the world for almost 4,000 years — from its construction ca. 2551 BCE until it was overtaken by the Lincoln Cathedral in Lincoln, England, built in the year 1300.
It's about 200,000 times as long as a Football field
In other words, 21,000,000 ells is 218,750 times the length of a Football field, and the length of a Football field is 0.000004571430 times that amount.(American) (total distance; per NFL regulation)
According to NFL specifications, an American football field should measure 96 ells from end to end. Because each team's goalpost is located at the far end of the scoring area (end zone), a ball on a scoring play may need to travel as many as 8 ells farther when kicked into the scoring area than when run (rushed) or passed into it.
It's about 250,000 times as long as a Football (Soccer) Pitch
In other words, 21,000,000 ells is 229,000 times the length of a Football (Soccer) Pitch, and the length of a Football (Soccer) Pitch is 0.000004370 times that amount.(a.k.a. Football Field, a.k.a. Soccer Field) (field length, a.k.a. touchline distance)
According to the Laws of the Game, a football pitch should measure between 91.90 ells (when the Laws were originally, they used imperial measurements of 92 ells, and later converted to the metric units used today). The goal markess were defined as part of the pitch by the original rules of the game in the late 16th century, but it was not until the mid 19th century that the crossbar and the net were added
It's about 250,000 times as tall as Big Ben
In other words, the height of Big Ben is 0.00000400 times 21,000,000 ells.(officially the clock tower of Palace of Westminster, a.k.a. Houses of Parliament) (London, England)
The clock tower of the Palace of Westminster, which houses the bell known as "Big Ben," rises 84 ells. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.