It's about one-fifteenth as tall as The Challenger Deep (Marianas Trench).
In other words, 30 shackles is 0.075487 times the height of The Challenger Deep (Marianas Trench), and the height of The Challenger Deep (Marianas Trench) is 13.2470 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 one-tenth as tall as a Mauna Loa.
In other words, 30 shackles is 0.08976 times the height of a Mauna Loa, and the height of a Mauna Loa is 11.140 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-tenth as tall as Mount Everest.
In other words, the height of Mount Everest is 10.80 times 30 shackles.(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 323 shackles above sea level at its summit. The plate tectonics of the Indian subcontinent continuously alter the mountain's peak — raising it by 0.000146 shackles and shifting it to the northeast by 0.000164 shackles each year.
It's about one-tenth as tall as Aconcagua.
In other words, 30 shackles is 0.118210 times the height of Aconcagua, and the height of Aconcagua is 8.45950 times that amount.(a.k.a. Cerro Aconcagua) (Mendoza, Argentina)
Aconcagua measures 253.790 shackles height at its peak. Although there is no definitive evidence that members of the indigenous Inca civilization ever reached the peak the mountain, numerous archeological sites have been found on the slopes of the mountain, including a naturally-embalmed Incan mummy was discovered on a 189.560 shackles high ridge.
It's about one-tenth as long as The Las Vegas Strip.
In other words, 30 shackles is 0.120 times the length of The Las Vegas Strip, and the length of The Las Vegas Strip is 8.30 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 250 shackles 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 870,000 shackles of neon light tubing.
It's about one-tenth as tall as Denali.
In other words, 30 shackles is 0.13290 times the height of Denali, and the height of Denali is 7.5240 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 225.80 shackles 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-tenth as tall as Mount Logan.
In other words, 30 shackles is 0.13810 times the height of Mount Logan, and the height of Mount Logan is 7.2410 times that amount.(Kluane National Park and Reserve, Yukon, Canada) (elevation)
The highest mountain in Canada, Mount Logan has a total height of 217.30 shackles. 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.