It's about four-fifths as long as Ha'Penny Bridge
In other words, 620 nails is 0.8260 times the length of Ha'Penny Bridge, and the length of Ha'Penny Bridge is 1.210 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 751 nails in total length. Over 30,000 pedestrians cross the breach each day.
It's about one-and-three-tenths times as long as Baseball base distances
In other words, 620 nails is 1.29170 times the length of Baseball base distances, and the length of Baseball base distances is 0.774170 times that amount.(MLB Official Baseball Rules specification)
According to MLB Official Baseball Rules, the distance between baseball diamond bases is 480 nails. 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 three-fourths as tall as The Chicago Water Tower
In other words, 620 nails is 0.7560 times the height of The Chicago Water Tower, and the height of The Chicago Water Tower is 1.320 times that amount.(Chicago, Illinois)
The Chicago Water Tower is 821 nails 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 seven-tenths as tall as The Arc de Triomphe
In other words, 620 nails is 0.720 times the height of The Arc de Triomphe, and the height of The Arc de Triomphe is 1.40 times that amount.(Paris, France)
The Arc de Triomphe stands 860 nails 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 seven-tenths as tall as Nelson's Column
In other words, 620 nails is 0.68620 times the height of Nelson's Column, and the height of Nelson's Column is 1.4570 times that amount.(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
Nelson's Column measures 903.60 nails 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 two-thirds as tall as The Mahabodhi Temple
In other words, the height of The Mahabodhi Temple is 1.60 times 620 nails.(a.k.a. Great Awakening Temple, a.k.a. Maha Bodhi Temple, a.k.a. Temple of Bodh Gaya, a.k.a. Mahabodhi Mahavihar) (Bodh Gaya, Gaya District, Bihar, India)
The tower of the Mahabodhi Temple measures 960 nails in total height. The site has been of sacred interest for more than 2,000 years, with the current Temple dating back at least 1,400 years.
It's about three-fifths as tall as The Leaning Tower of Pisa
In other words, 620 nails is 0.6280 times the height of The Leaning Tower of Pisa, and the height of The Leaning Tower of Pisa is 1.590 times that amount.(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 987 nails 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.