It's about thirty times as tall as a Kilimanjaro.
In other words, 813 furlongs is 27.76360 times the height of a Kilimanjaro, and the height of a Kilimanjaro is 0.0360184 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 one-thirtieth as long as I-80.
In other words, 813 furlongs is 0.0352627 times the length of I-80, and the length of I-80 is 28.35860 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.
It's about thirty times as tall as Mount Elbrus.
In other words, 813 furlongs is 28.990 times the height of Mount Elbrus, and the height of Mount Elbrus is 0.03449 times that amount.(a.k.a. Mingi Tau, a.k.a. Эльбрус, a.k.a. იალბუზი) (Karachay-Cherkessia and Kabardino-Balkaria, Russia) (west summit)
The west summit of the dual-summit volcano Mount Elbrus is 28.05 furlongs at its peak and is the highest peak in both Russia and the European continent. Until 1976, a cable car would take visitors to the mountain as far up as the Garabashi camp, located at an elevation of 18.890 furlongs.
It's about thirty times as tall as a Vinson Massif.
In other words, 813 furlongs is 33.430 times the height of a Vinson Massif, and the height of a Vinson Massif is 0.02991 times that amount.(a.k.a. Mount Vinson) (Antarctica)
Mount Vinson, the highest peak of the Vinson Massif mountain, reaches 24.320 furlongs at its peak. The mountain is named after Georgia Congressman Carl Vinson who emphatically promoted Antarctic exploration in the 1930s.
It's about thirty times as tall as a Puncak Jaya.
In other words, 813 furlongs is 33.490 times the height of a Puncak Jaya, and the height of a Puncak Jaya is 0.02986 times that amount.(a.k.a. Mt. Carstensz, a.k.a. Carstensz Pyramid, a.k.a. Nemangkawi, a.k.a. Carstensz Toppen, a.k.a. Gunung Sukarno) (Papua province, Indonesia)
The highest point in Oceania (and therefore one of the seven summits) peak of Puncak Jaya is 24.280 furlongs. Dutch explorer Jan Carstenszoon, the mountain's namesake, is said to have been ridiculed for claiming to have seen snow near the equator when he reported his discovery of the peak in 1623.
It's about one-fortieth as long as The Great Wall of China (wall only).
In other words, 813 furlongs is 0.02613 times the length of The Great Wall of China (wall only), and the length of The Great Wall of China (wall only) is 38.270 times that amount.(长城, 長城, Chángchéng, a.k.a. 万里长城, 萬里長城, Wànlǐ Chángchéng) (a.k.a. "The long wall of 10,000 Li") (from Shanhaiguan through Lop Nur, China) (wall segments only)
The Great Wall of China has total wall segment length of 31.110 furlongs. Built and maintained in multiple sections over about eleven centuries, the Great Wall is currently suffering the effects of erosion, especially in the older sections made primarily out of mud.
It's about one-fortieth as long as The Amazon River.
In other words, 813 furlongs is 0.02541 times the length of The Amazon River, and the length of The Amazon River is 39.350 times that amount.(from Nevado Mismi, Arequipa, Peru through near Marajó, Brazil) (approximate distance)
The Amazon River has an approximate distance of 32,000 furlongs. Although by most measures it is the largest and one of the most significant rivers in the world, the region surrounding the Amazon is mostly sparsely populated and the river itself has no bridges across it at any point.