It's about 700 times as long as The Navy Pier.
In other words, the length of The Navy Pier is 0.001 times 668 kilometers.(a.k.a. Municipal Pier #2) (Chicago, Illinois)
The Navy Pier is 0.90 kilometers in total length. Originally named Municipal Pier #2, the pier was renamed Navy Pier in 1927 in honor of Naval personnel stationed there during World War I.
It's about 700 times as tall as The Three Sisters Falls.
In other words, the height of The Three Sisters Falls is 0.001 times 668 kilometers.(a.k.a. Cataratas las Tres Hermanas) (Ayacucho, Peru)
The Three Sisters Falls rise to 0.90 kilometers in height. The falls are called Three Sisters after the three large tiers over which the falls flow.
It's about 700 times as tall as Tugela Falls.
In other words, 668 kilometers is 705 times the height of Tugela Falls, and the height of Tugela Falls is 0.00142 times that amount.(Royal Natal National Park, KwaZulu-Natal, South Africa)
Tugela Falls rises to 0.9480 kilometers in height. The falls are the highest in Africa and the second highest in the world.
It's about 750 times as tall as Olo'upena Falls.
In other words, 668 kilometers is 742.10 times the height of Olo'upena Falls, and the height of Olo'upena Falls is 0.001348 times that amount.(a.k.a. Oloupena Falls) (Molokai, Hawaii)
Olo'upena Falls rise to 0.90010 kilometers in height. The isolated falls are the tallest in the United States and the fourth tallest in the world.
It's about 800 times as tall as Burj Dubai.
In other words, 668 kilometers is 807 times the height of Burj Dubai, and the height of Burj Dubai is 0.00124 times that amount.(formally Burj Khalifa, a.k.a. Dubai Tower, a.k.a. برج خليفة) (Dubai, UAE) (to roof)
Burj Khalifa, the tallest manmade structure in the world, stands 0.8280 kilometers to its roof. The tower also holds the current records for the world's highest Islamic mosque — at approximately 0.5770 kilometers on the 158th floor (of 163 floors) — and the world's tallest outdoor swimming pool — at approximately 0.2850 kilometers on the 78th floor.
It's about 850 times as tall as Gocta Falls.
In other words, 668 kilometers is 866 times the height of Gocta Falls, and the height of Gocta Falls is 0.00115 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 0.7710 kilometers in total height. Although it sits just 42 km 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.
It's about 1,000 times as tall as a Canton Tower.
In other words, 668 kilometers is 1,100 times the height of a Canton Tower, and the height of a Canton Tower is 0.00091 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 0.610 kilometers 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.