It's about one-seven-hundredth as long as The Danube
In other words, 20 furlongs is 0.00141 times the length of The Danube, and the length of The Danube is 709 times that amount.(a.k.a. Donau, a.k.a. Dunaj, a.k.a. Dunav, a.k.a. Duna, a.k.a. Дунав (Dunav), a.k.a. Dunărea, a.k.a. Дунáй (Dunay), a.k.a. Tuna) (from Breg Martinskapelle, Black Forest, Germany through the Danube Delta, Romania)
The Danube river runs 14,200 furlongs in total length. Intersecting Vienna, Austria; Bratislava, Slovakia; Budapest, Hungary; and Belgrade, Serbia, the Danube touches more capital cities than any other river.
It's about one-eight-hundred-fiftieth as long as The Oregon Trail
In other words, 20 furlongs is 0.00115 times the length of The Oregon Trail, and the length of The Oregon Trail is 870 times that amount.(from Independence, Missouri to Oregon City, Oregon)
The historic Oregon Trail stretched 17,300 furlongs across five (sometimes six) states in the western United States. In the early years of the Trail's existence, the trip was estimated to have taken an average of 160 days.
It's about one-nine-hundredth as long as The Volga
In other words, 20 furlongs is 0.00114 times the length of The Volga, and the length of The Volga is 877 times that amount.(a.k.a. Волга, a.k.a. İdel (Идел), a.k.a. Атăл (Atăl), a.k.a. Edil, a.k.a. İdil, a.k.a. Рав (Rav)) (from the Valdai Hills, Tver Oblast, Russia through the Caspian Sea)
The largest river in Europe, the Volga river runs 17,500 furlongs in total length. World War II's Battle of Stalingrad between the Nazi Germany and the Soviet Union, which resulted in nearly two million casualties, was fought in part for control of the river.
It's about one-nine-hundred-fiftieth as long as The Mississippi River
In other words, 20 furlongs is 0.001068 times the length of The Mississippi River, and the length of The Mississippi River is 936.30 times that amount.(from Lake Itasca, Minnesota through Pilottown, Plaquemines Parish, Louisiana)
The total length of the Mississippi River is 18,720 furlongs. Prior to the development of soil erosion programs, the Mississippi River would carry approximately 400 million metric tons of sediment from its banks to the Gulf of Mexico every year.
It's about 1,000 times as long as a Beetle (Volkswagen)
In other words, 20 furlongs is 986.40 times the length of a Beetle (Volkswagen), and the length of a Beetle (Volkswagen) is 0.001014 times that amount.(1964 model) (a.k.a. Volkswagen 1200, a.k.a. Käfer)
A 1964 Volkswagen Beetle measures 0.02028 furlongs. As the longest continuously-produced automobile design — in production for 75 years between 1938 and 2003 — the Beetle was voted the most fourth-most influential car of the twentieth century by the Global Automotive Elections Foundation.
It's about one-one-thousandth as long as The Distance from L.A. to New York
In other words, 20 furlongs is 0.000896 times the length of The Distance from L.A. to New York, and the length of The Distance from L.A. to New York is 1,120 times that amount.(Los Angeles, California to New York City, New York) (via I-10 E, I-15 N, I-70 E, I-76 E, I-80 E, I-280 E)
The total length of the freeway route from Los Angeles, California to New York City, New York via Interstate 80 is 22,300 furlongs long. This route intersects eleven states and several major cities, including Las Vegas, Nevada; Denver, Colorado; Lincoln, Nebraska; Omaha, Nebraska; Des Moines, Iowa; South Bend, Indiana; and Cleveland, Ohio.
It's about one-one-thousandth as long as I-80
In other words, 20 furlongs is 0.000867472 times the length of I-80, and the length of I-80 is 1,152.770 times that amount.(a.k.a. Interstate 80, a.k.a. Keystone Shortway) (net length)
Interstate 80, crosses the continent of North America from Teaneck, New Jersey to San Francisco, California and covers a total length of 23,055.50 furlongs. A 298.2580 furlongs stretch between mile marker 318 in Grand Island, Nebraska and mile marker 390 in Lincoln, Nebraska is the longest straight path in the US Interstate system.