It's about one-and-one-tenth times as tall as Olympus Mons.
In other words, the height of Olympus Mons is 0.91 times 143 furlongs.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 130 furlongs. The mountain has been known to astronomers since the nineteenth century because it is tall enough to rise above Mars' frequent dust storms.
It's about two-and-a-half times as tall as Maxwell Montes.
In other words, the height of Maxwell Montes is 0.38 times 143 furlongs.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 55 furlongs. Since Venus does not seem to have the kind of tectonic activity which gives rise to mountains on Earth, the origin of the Venusian mountain remains the subject of some dispute.
It's about two-and-a-half times as tall as The Challenger Deep (Marianas Trench).
In other words, 143 furlongs is 2.6387 times the height of The Challenger Deep (Marianas Trench), and the height of The Challenger Deep (Marianas Trench) is 0.37897 times that amount.(near Marianas Islands, a.k.a. Ladrones Islands, northwestern Pacific Ocean) (depth below sea level)
The Challenger Deep, at the southern end of the Marianas Trench, reaches a depth of 54.194 furlongs below sea level. There has been only one manned expedition to the bottom of Challenger Deep — a 1960 voyage that took 4 hours and 48 minutes to reach the bottom.
It's about one-third as long as The Panama Canal.
In other words, the length of The Panama Canal is 3 times 143 furlongs.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 440 furlongs in length. Ships passing through the Canal are raised (and then lowered) 0.13 furlongs above sea level through the lock-and-dam system.
It's about three times as tall as a Mauna Loa.
In other words, 143 furlongs is 3.138 times the height of a Mauna Loa, and the height of a Mauna Loa is 0.3187 times that amount.(Hawaii) (Hawaiian island volcano) (total height from seafloor)
Mauna Loa, one of the five volcanoes which forms the island of Hawaii and the tallest mountain in total height in the world, rises to 45.73 furlongs above the seafloor. The peak of Loa is home to the approximately 6,000 sq. m (0.6 ha) Lake Waiau, one of the highest altitude lakes in the United States outside of Colorado.
It's about three-and-a-half times as tall as Mount Everest.
In other words, 143 furlongs is 3.25 times the height of Mount Everest, and the height of Mount Everest is 0.308 times that amount.(a.k.a. Mount Chomolungma, a.k.a. सगरमाथा, a.k.a. Chajamlungma, a.k.a. ཇོ་མོ་གླང་མ, a.k.a. 珠穆朗玛峰, a.k.a. Zhūmùlǎngmǎ Fēng) (Sagarmatha Zone, Nepal and Tibet, China) (to summit, excluding snow depth)
Mount Everest is 44 furlongs above sea level at its summit. The plate tectonics of the Indian subcontinent continuously alter the mountain's peak — raising it by 0.0000199 furlongs and shifting it to the northeast by 0.0000224 furlongs each year.
It's about one-fourth as long as The English Channel.
In other words, 143 furlongs is 0.269 times the length of The English Channel, and the length of The English Channel is 3.72 times that amount.(average width between Isle of Ushant and The Walde Lighthouse) (La Manche, Ärmelkanal, Mor Breizh, Mor Bretannek) (a.k.a. The Channel)
The English Channel measures between 532 furlongs, narrowing as it flows northeast. The world speed record for a Channel crossing by swimmer was set by Australian Trent Grimsey in 2012, with a time of 6 hours, 55 minutes.