It's about as long as The Wingspan of a 747
It's about nine-tenths as tall as a Giant Sequoia (tree)
In other words, the height of a Giant Sequoia (tree) is 1.10 times 68.50 meters.(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 76 m. 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 one-and-one-fifth times as tall as The Cinderella Castle
In other words, 68.50 meters is 1.190 times the height of The Cinderella Castle, and the height of The Cinderella Castle is 0.840 times that amount.(Fantasyland, Magic Kingdom, Walt Disney World, Lake Buena Vista and Bay Lake, Florida)
Walt Disney World's Cinderella Castle is 57.6 m tall. The castle's architecture uses the optical trick known as "forced perspective" — the castle gets smaller near the top — to appear larger than it truly is.
It's about one-and-one-fifth times as tall as The Leaning Tower of Pisa
In other words, 68.50 meters is 1.210 times the height of The Leaning Tower of Pisa, and the height of The Leaning Tower of Pisa is 0.8260 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 56.4 m 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.
It's about one-and-one-third times as tall as Nelson's Column
In other words, 68.50 meters is 1.3260 times the height of Nelson's Column, and the height of Nelson's Column is 0.75410 times that amount.(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
Nelson's Column measures 51.64 m 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 three-fourths as tall as The Statue of Liberty
In other words, 68.50 meters is 0.73660 times the height of The Statue of Liberty, and the height of The Statue of Liberty is 1.3580 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 92.99 m 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 one-and-two-fifths times as tall as The Arc de Triomphe
In other words, the height of The Arc de Triomphe is 0.710 times 68.50 meters.(Paris, France)
The Arc de Triomphe stands 49 m 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.