It's about 35,000 times as tall as Big Ben
In other words, 623 leagues is 36,000 times the height of Big Ben, and the height of Big Ben is 0.000028 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 0.017 leagues. The tower has no elevator, and is therefore only accessible by climbing 334 steps to the top.
It's about 35,000 times as tall as The Statue of Liberty
In other words, 623 leagues is 37,220 times the height of The Statue of Liberty, and the height of The Statue of Liberty is 0.00002687 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 0.01674 leagues 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 45,000 times as tall as a Giant Sequoia (tree)
In other words, 623 leagues is 46,000 times the height of a Giant Sequoia (tree), and the height of a Giant Sequoia (tree) is 0.000022 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 0.014 leagues. 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 50,000 times as wide as The Wingspan of a 747
In other words, 623 leagues is 50,500 times the width of The Wingspan of a 747, and the width of The Wingspan of a 747 is 0.0000198 times that amount.(a.k.a. Boeing 747, a.k.a. Jumbo Jet, a.k.a. Queen of the Skies) (for Boeing 747-8 series)
The wingspan of a Boeing 747-8 is 0.0123 leagues. Fully loaded, the 747 can travel 1,490 leagues before refueling.
It's about 60,000 times as tall as The Cinderella Castle
In other words, 623 leagues is 60,100 times the height of The Cinderella Castle, and the height of The Cinderella Castle is 0.0000166 times that amount.(Fantasyland, Magic Kingdom, Walt Disney World, Lake Buena Vista and Bay Lake, Florida)
Walt Disney World's Cinderella Castle is 0.0104 leagues 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 60,000 times as tall as The Leaning Tower of Pisa
In other words, 623 leagues is 61,400 times the height of The Leaning Tower of Pisa, and the height of The Leaning Tower of Pisa is 0.0000163 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 0.0102 leagues 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 65,000 times as tall as The Mahabodhi Temple
In other words, 623 leagues is 63,000 times the height of The Mahabodhi Temple, and the height of The Mahabodhi Temple is 0.000016 times that amount.(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 0.0099 leagues 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.