It's about as long as The Navy Pier.
The Navy Pier is 0.6 miles in total length. Originally named Municipal Pier #2, the pier was renamed Nay Pier in 1927 in honor of Naval soldiers stationed there during World War I.
It's about as tall as The Three Sisters Falls.
The Three Sisters Falls rise to 0.6 miles in height. The falls are called Three Sisters after the three large tiers over which the falls flow.
It's about one-and-one-tenth times as tall as Angel Falls.
In other words, 0.684 miles is 1.12 times the height of Angel Falls, and the height of Angel Falls is 0.893 times that amount.(a.k.a. Parakupa-vena, a.k.a. Kerepakupai mer&) (Auyantepui, Canaima National Park, Venezuela) (total height)
Angel Falls has a total height 0.608 miles. Jimmie Angel, the first person to publicize their existence outside Venezuela and the namesake of the falls, damaged his monoplane atop the falls and was forced to abandon it; it remained there until it was removed 33 years later.
It's about one-and-one-fifth times as tall as Tugela Falls.
In other words, 0.684 miles is 1.16 times the height of Tugela Falls, and the height of Tugela Falls is 0.862 times that amount.(Royal Natal National Park, KwaZulu-Natal, South Africa)
Tugela Falls rises to 0.589 miles in height. The falls are the highest in Africa and the second highest in the world.
It's about one-and-one-fifth times as tall as Olo'upena Falls.
In other words, 0.684 miles is 1.223 times the height of Olo'upena Falls, and the height of Olo'upena Falls is 0.8177 times that amount.(a.k.a. Oloupena Falls) (Molokai, Hawaii)
Olo'upena Falls rise to 0.5593 miles in height. The isolated falls are the tallest in the United States and the fourth tallest in the world.
It's about one-and-one-third times as tall as Burj Dubai.
In other words, the height of Burj Dubai is 0.752 times 0.684 miles.(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 0.514 miles to its roof. The tower also holds the current records for the world's highest Islamic mosque — at approximately 0.359 miles on the 158th floor (of 163 floors) — and the world's tallest outdoor swimming pool — at approximately 0.177 miles on the 78th floor.
It's about one-and-two-fifths times as tall as Gocta Falls.
In other words, 0.684 miles is 1.43 times the height of Gocta Falls, and the height of Gocta Falls is 0.699 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 0.479 miles in total height. Although it sits just 26.1 miles 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.