It's about three-fourths as tall as a Mauna Loa.
In other words, 250 shackles is 0.7480 times the height of a Mauna Loa, and the height of a Mauna Loa is 1.3370 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 335.40 shackles 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 one-and-two-fifths times as tall as a Vinson Massif.
In other words, 250 shackles is 1.4020 times the height of a Vinson Massif, and the height of a Vinson Massif is 0.71330 times that amount.(a.k.a. Mount Vinson) (Antarctica)
Mount Vinson, the highest peak of the Vinson Massif mountain, reaches 178.30 shackles at its peak. The mountain is named after Georgia Congressman Carl Vinson who emphatically promoted Antarctic exploration in the 1930s.
It's about one-and-two-fifths times as tall as a Puncak Jaya.
In other words, 250 shackles is 1.4040 times the height of a Puncak Jaya, and the height of a Puncak Jaya is 0.71230 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 178 shackles. 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 three-fifths as tall as The Challenger Deep (Marianas Trench).
In other words, 250 shackles is 0.629060 times the height of The Challenger Deep (Marianas Trench), and the height of The Challenger Deep (Marianas Trench) is 1.58970 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 397.420 shackles 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 three-fifths as tall as Maxwell Montes.
In other words, 250 shackles is 0.620 times the height of Maxwell Montes, and the height of Maxwell Montes is 1.60 times that amount.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 400 shackles. 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 one-and-seven-tenths times as long as The Indianapolis Motor Speedway.
In other words, 250 shackles is 1.704550 times the length of The Indianapolis Motor Speedway, and the length of The Indianapolis Motor Speedway is 0.5866650 times that amount.(Speedway, Indiana) (rectangular oval course)
The rectangular oval course of the Indianapolis Motor Speedway is 146.6670 shackles. While famous for its automotive racing, the first motorsport held at the track was a series of motorcycle races in August, 1909 — a little less than two years before the inaugural Indianapolis 500 race was run.
It's about one-and-seven-tenths times as long as Daytona International Speedway.
In other words, 250 shackles is 1.704550 times the length of Daytona International Speedway, and the length of Daytona International Speedway is 0.5866650 times that amount.(Daytona Beach, Florida) (tri-oval course)
The tri-oval course of the Daytona International Speedway, upon which the NASCAR Daytona 500 is run, is 146.6670 shackles in length. Although the tri-oval design is said to allow for greater visibility during the race, the real reason for the then-unique design was that plot available for construction of the track was only 350 acres and could not accommodate a traditional oval layout of appropriate length.