It's about half as tall as The Empire State Building
In other words, 855 spans is 0.51299 times the height of The Empire State Building, and the height of The Empire State Building is 1.9494 times that amount.(New York City, New York) (to top of building)
The Empire State Building stands 1,666.70 spans to its architectural peak. The spire emerging from the top of the building was originally intended to be a mooring mast for blimps whose passengers could disembark onto a landing platform on the 102
It's about two times as tall as Big Ben
In other words, 855 spans is 2 times the height of Big Ben, and the height of Big Ben is 0.5 times that amount.(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 420 spans. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.
It's about two times as tall as The Statue of Liberty
In other words, 855 spans is 2.102 times the height of The Statue of Liberty, and the height of The Statue of Liberty is 0.4757 times that amount.(a.k.a. "Liberty Enlightening the World," a.k.a. La Liberté Éclairant le Monde) (Liberty Island, New York City, New York) (pedestal base to torch peak)
The Statue of Liberty reaches 406.80 spans including the pedestal. The statue was designed using an optical trick known as "forced perspective" to make the statue appear proportionally correct when viewed from its base and is, in actuality, disproportionately large at the top.
It's about two-fifths as tall as The Petronas Twin Towers
In other words, 855 spans is 0.4325 times the height of The Petronas Twin Towers, and the height of The Petronas Twin Towers is 2.312 times that amount.(a.k.a. Menara Berkembar Petronas, a.k.a. Petronas Towers) (Kuala Lumpur, Malaysia) (to spire)
Each of the Petronas Towers stands 1,977 spans to their spires. Holding the record as the tallest buildings in the world from 1998 to 2004, the towers continue to hold the record for the deepest foundation barrettes — up to 503.10 spans deep.
It's about two-fifths as tall as The Shanghai World Financial Center
In other words, 855 spans is 0.397 times the height of The Shanghai World Financial Center, and the height of The Shanghai World Financial Center is 2.52 times that amount.(上海环球金融中 上海環球金融中心, Shànghǎi huánqiú jīnróng zhōngxīn) (a.k.a. SWFC) (Shanghai, China) (to spire)
The Shanghai World Financial Center is 2,150 spans tall to its roof. It is home to both the world's highest hotel (on its 79th through 93rd floors) and the world's tallest observation deck (on its 100
It's about two-and-a-half times as tall as a Giant Sequoia (tree)
In other words, 855 spans is 2.6 times the height of a Giant Sequoia (tree), and the height of a Giant Sequoia (tree) is 0.38 times that amount.(a.k.a. Sequoiadendron giganteum, a.k.a. Sierra redwood, a.k.a. Wellingtonia)
Giant Sequoias of the Giant Sequoia National Monument located in Sierra Nevada, near Visalia, California can grow to heights of 330 spans. The wood from the Giant Sequoias is often brittle and prone to shattering when such trees are felled, and as a result the trees logged in the late nineteenth century were often usable only as shingles or matchsticks.
It's about two-fifths as tall as The Willis Tower
In other words, 855 spans is 0.376 times the height of The Willis Tower, and the height of The Willis Tower is 2.66 times that amount.(a.k.a. Sears Tower) (Chicago, Illinois) (to antenna peak)
The Willis Tower rises to about 2,270 spans to the top of its tallest antenna. The bathrooms on the 103rd floor are said to be the highest in the western hemisphere at about 1,800 spans.