It's about as tall as The Ostankino Tower
It's about one-and-one-tenth times as tall as The CN Tower
In other words, 556 meters is 1.005 times the height of The CN Tower, and the height of The CN Tower is 0.99522 times that amount.(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada) (to spire)
The CN Tower measures 553.33 m tall at its spire. Used only in emergencies and for charitable climbing events, the 2,579-step staircase to the top is the longest metal staircase in the world.
It's about one-and-one-tenth times as tall as The Willis Tower
In other words, 556 meters is 1.1 times the height of The Willis Tower, and the height of The Willis Tower is 0.935 times that amount.(a.k.a. Sears Tower) (Chicago, Illinois) (to antenna peak)
The Willis Tower rises to about 520 m 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 412 m.
It's about nine-tenths as tall as a Canton Tower
In other words, 556 meters is 0.91 times the height of a Canton Tower, and the height of a Canton Tower is 1.1 times that amount.(a.k.a. Guangzhou TV & Sightseeing Tower, a.k.a. 广 州 电 视 观 光 塔) (Guangzhou, China) (to spire)
The Guangzhou TV & Sightseeing Tower stands 610 m to its spire. Initially described as holding the record for the tallest Ferris wheel in the world, the ride at the top of the tower is actually an observation carousel; cars complete a trip around the top-floor track about every half-hour.
It's about one-and-one-tenth times as tall as The Shanghai World Financial Center
In other words, 556 meters is 1.13 times the height of The Shanghai World Financial Center, and the height of The Shanghai World Financial Center is 0.885 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 492 m 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 one-and-one-fourth times as tall as The Petronas Twin Towers
In other words, 556 meters is 1.23 times the height of The Petronas Twin Towers, and the height of The Petronas Twin Towers is 0.813 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 451.9 m 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 115 m deep.
It's about seven-tenths as tall as Gocta Falls
In other words, 556 meters is 0.721 times the height of Gocta Falls, and the height of Gocta Falls is 1.39 times that amount.(a.k.a. Gocta Cataracts, a.k.a. Catarata del Gocta) (Amazonas, Peru) (total height)
Gocta Falls, a waterfall on the Cocahuayco River, measures 771 m in total height. Although it sits just 42,000 meters from the major city of Chachapoyas, the waterfall was unknown to non-locals until it was documented during a 2005 expedition by a German economist.