It's about two-thirds as tall as a Kilimanjaro
In other words, 20 furlongs is 0.6829920 times the height of a Kilimanjaro, and the height of a Kilimanjaro is 1.464150 times that amount.(a.k.a. Mount Kilimanjaro) (Tanzania) (to Uhuru peak; 2008 gravimeter measurement)
Kilimanjaro rises to 29.28290 furlongs at its peak. An isolated peak with no surrounding mountain range, Kilimanjaro is considered the world's tallest freestanding mountain.
It's about two-thirds as tall as Mount Logan
In other words, 20 furlongs is 0.67520 times the height of Mount Logan, and the height of Mount Logan is 1.4810 times that amount.(Kluane National Park and Reserve, Yukon, Canada) (elevation)
The highest mountain in Canada, Mount Logan has a total height of 29.630 furlongs. The high altitude and northern latitude of the mountain resulted in one-time temperature of -77.5 °C — the lowest temperature ever recorded outside of Antarctica.
It's about two-thirds as tall as Denali
In other words, 20 furlongs is 0.64970 times the height of Denali, and the height of Denali is 1.5390 times that amount.(a.k.a. Mount McKinley, a.k.a. Doleika, a.k.a. Traleika, a.k.a. "The Great One") (Denali National Park and Preserve, Alaska) (South peak)
The highest mountain peak in North America, Denali's South Peak measures 30.790 furlongs above sea level at its peak. The impetus for the name Mount McKinley was US president William McKinley of Ohio, and disputes over the which of the mountain's names should be officially recognized regularly occur between Ohio Congressmen and Alaska politicians.
It's about one-and-three-fifths times as long as Steel Dragon 2000
In other words, 20 furlongs is 1.6230 times the length of Steel Dragon 2000, and the length of Steel Dragon 2000 is 0.61610 times that amount.(a.k.a. スチールドラゴン2000) (Nagashima Span Land; Kuwana, Mie Prefecture, Japan)
The roller coaster Steel Dragon 2000 is 12.320 furlongs in length. It is one of only two operating "Gigacoasters" (meaning its height is between 0.45450 furlongs and 0.60450 furlongs) in the world, having a height of 0.48220 furlongs.
It's about three-fifths as long as Calangute Beach
In other words, the length of Calangute Beach is 2 times 20 furlongs.(Goa, India) (approximate)
One of the most popular tourist destinations in Goa, Calangute Beach, the "Queen of Beaches," stretches about 7 km in length.
It's about one-and-two-thirds times as long as The Belmont Stakes
In other words, 20 furlongs is 1.6666670 times the length of The Belmont Stakes, and the length of The Belmont Stakes is 0.59999990 times that amount.(Belmont Park, Elmont, New York) (total race length)
The total race length of the Belmont Stakes run at Belmont Park is 12 furlongs. It was during the 1974 Belmont Stakes that Secretariat set an America Grade 1 stakes record in winning by a distance of about 0.37575760 furlongs
It's about three-fifths as long as The Las Vegas Strip
In other words, 20 furlongs is 0.590 times the length of The Las Vegas Strip, and the length of The Las Vegas Strip is 1.70 times that amount.(Las Vegas Boulevard S and W from Russel Rd to Sahara Ave)(Paradise, Nevada through Winchester, Nevada).
Although technically located beyond the city limits of Las Vegas (along with the well-known "Welcome to Fabulous Las Vegas" sign), the stretch of road known as the "Las Vegas Strip" runs 34 furlongs along Las Vegas Boulevard South and West from Russel Road at the south end to Sahara Avenue at the north end. The casinos and hotels on the Strip display an estimated total of 120,000 furlongs of neon light tubing.