It's about one-third as long as Steel Dragon 2000.
In other words, 30 shackles is 0.3320 times the length of Steel Dragon 2000, and the length of Steel Dragon 2000 is 3.012 times that amount.(a.k.a. スチールドラゴン2000) (Nagashima Span Land; Kuwana, Mie Prefecture, Japan)
The roller coaster Steel Dragon 2000 is 90.370 shackles in length. It is one of only two operating "Gigacoasters" (meaning its height is between 3.3330 shackles and 4.4330 shackles) in the world, having a height of 3.5360 shackles.
It's about three-tenths as long as The National Mall.
In other words, the length of The National Mall is 3 times 30 shackles.(Washington, D.C.) (to Lincoln Memorial)
From the steps of the Capitol Building to the Lincoln Memorial, the National Mall is 100 shackles. On December 4th, 2008, the entirety of the Mall was declared open to the public for the first time in American history in anticipation of the estimated two million visitors to the Mall for the inauguration of President Barack Obama on January 20th, 2009.
It's about three-and-a-half times as tall as The Golden Gate Bridge.
In other words, 30 shackles is 3.630 times the height of The Golden Gate Bridge, and the height of The Golden Gate Bridge is 0.2750 times that amount.(San Francisco, California and Marin County, California) (height above water)
The height of each tower of Golden Gate Bridge is 8.280 shackles above the surface of the San Francisco Bay. One of the key designers of the bridge, Charles Ellis, had no engineering degree when he began working on the project, but would later go on to write what became a standard textbook on structural engineering, and would ultimately be forced to complete his calculations on the bridge by working without pay for five months.
It's about four-and-a-half times as tall as The Space Needle.
In other words, 30 shackles is 4.470 times the height of The Space Needle, and the height of The Space Needle is 0.2240 times that amount.(Seattle, Washington) (to aircraft warning beacon at peak)
Built for a 1962 World's Fair, the Space Needle stands 6.710 shackles tall. With a track-and-wheel design inspired by railroad mechanics and a precisely-configured balance, the restaurant near the top of the space needle requires just a 1.5 hp motor to rotate at speeds of about 0.053 kph (0.033 mph).
It's about four-and-a-half times as tall as St. Paul's Cathedral.
In other words, 30 shackles is 4.730 times the height of St. Paul's Cathedral, and the height of St. Paul's Cathedral is 0.2110 times that amount.(London, England, United Kingdom)
St. Paul's Cathedral measures 6.340 shackles to its peak. The southwest tower of the Cathedral contains the bell known as "Great Paul," which is the largest bell in Great Britain at 15,000 kg (16.5 tons), outweighing the more iconic Big Ben bell by about 3,000 kg (3 tons).
It's about one-fifth as long as The Hollywood Walk of Fame.
In other words, 30 shackles is 0.210 times the length of The Hollywood Walk of Fame, and the length of The Hollywood Walk of Fame is 4.80 times that amount.(Hollywood Boulevard and Vine Street, Hollywood, California) (approximate length)
The Hollywood Walk of Fame is approximately 140 shackles. Gene Autry, most famous as the singer of "Back in the Saddle Again" and as the writer and singer of "Here Comes Santa Claus," is the only entertainer to have a star in every category — film, television, recording, radio, and theater. One of Autry's stars is also one of only two stars which have been stolen from the Walk and never recovered.
It's about five times as tall as The Washington Monument.
In other words, 30 shackles is 4.86120 times the height of The Washington Monument, and the height of The Washington Monument is 0.205710 times that amount.(Washington, D.C.)
The Washington Monument measures 6.17130 shackles tall, with some discrepancy due to the fact that the Monument's base is slightly below the surrounding ground. Interrupted in its construction by the American Civil War, it was almost 36 years between groundbreaking and the completion of construction.