It's about one-twentieth as tall as a Mauna Loa.
In other words, 556 yards is 0.05545 times the height of a Mauna Loa, and the height of a Mauna Loa is 18.03 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 10,060 yards 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-twentieth as tall as The Challenger Deep (Marianas Trench).
In other words, 556 yards is 0.046634 times the height of The Challenger Deep (Marianas Trench), and the height of The Challenger Deep (Marianas Trench) is 21.4440 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 11,923 yards 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-twentieth as tall as Maxwell Montes.
In other words, the height of Maxwell Montes is 22 times 556 yards.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 12,000 yards. 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-fifty-fifth as tall as Olympus Mons.
In other words, the height of Olympus Mons is 53 times 556 yards.(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 30,000 yards. 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 one-one-hundred-fiftieth as long as The Panama Canal.
In other words, the length of The Panama Canal is 170 times 556 yards.(Canal de Panamá) (Panama)
Connecting the Atlantic and Pacific Oceans across the Isthmus of Panama, the Canal measures 96,000 yards in length. Ships passing through the Canal are raised (and then lowered) 28 yards above sea level through the lock-and-dam system.
It's about one-two-hundredth as long as The English Channel.
In other words, 556 yards is 0.00475 times the length of The English Channel, and the length of The English Channel is 211 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 117,000 yards, 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.
It's about one-two-hundred-fiftieth as long as The 405.
In other words, 556 yards is 0.0043625 times the length of The 405, and the length of The 405 is 229.230 times that amount.(a.k.a. I-405, Interstate 405, San DIego Freeway) (Southern California)
Running from Irvine to San Fernando, The 405 runs a total of 127,450 yards. The 405 is the most heavily-trafficed freeway in the United States, with an average speed as low as 8 kph during rush hours.