It's about 0.0000002 times as big as Fort Irwin.
In other words, 51 squares is 0.000000180 times the size of Fort Irwin, and the size of Fort Irwin is 5,600,000 times that amount.(San Bernardino County, California)
Fort Irwin measures 280,000,000 squares in total area. It is known as part of the Installation Management Command and as the home of the Army's National Training Center.
It's about 6,000,000 times as big as a Nailhead.
In other words, 51 squares is 6,095,000 times the size of a Nailhead, and the size of a Nailhead is 0.00000016410 times that amount.(for 11-gauge wire nai)
An 11-gauge nailhead measures 0.0000083680 squares. Nails have been used since ancient times; archaeologists have discovered Ancient Egyptian nails that are over 5,000 years old.
It's about 0.0000002 times as big as Yosemite National Park.
In other words, 51 squares is 0.0000001565330 times the size of Yosemite National Park, and the size of Yosemite National Park is 6,388,430 times that amount.(Tuolumne, Mariposa, and Madera counties, California, near Mariposa, California) (total land area)
Famous for its granite cliffs and Giant Sequoia groves, Yosemite National Park is 325,810,000 squares in total area, of which 22,388,900 squares is the well-known Yosemite Valley. The Park is known as the home of Yosemite Falls — the highest waterfall in North America and sixth highest in the world at 739 m (2,420 ft)
It's about 0.0000002 times as big as Big Bend National Park.
In other words, 51 squares is 0.0000001461370 times the size of Big Bend National Park, and the size of Big Bend National Park is 6,842,890 times that amount.(Brewster County, Texas, near Alpine, Texas)
Located on the Rio Grande (a.k.a. Rio Bravo) which forms part of the boundary between the United States and Mexico, Big Bend National Park occupies 348,986,000 squares. With less than half a million visitors per year, Big Bend is one of the continental United States' least trafficked parks.
It's about 0.0000001 times as big as Rhode Island.
In other words, 51 squares is 0.0000001184020 times the size of Rhode Island, and the size of Rhode Island is 8,445,800 times that amount.(a.k.a. The State of Rhode Island and Providence Plantations, a.k.a. RI) (United States)
The "Ocean State," Rhode Island measures 430,735,000 squares in total area. Several large bays totaling 291,271,000 squares make up 32.4% of its total area.
It's about 0.0000001 times as big as Fort Bliss.
In other words, 51 squares is 0.0000001050 times the size of Fort Bliss, and the size of Fort Bliss is 9,520,000 times that amount.(near Las Cruces, New Mexico and El Paso, Texas)
Fort Bliss is the United States Army's second-largest installation with a total area of 488,000,000 squares. It is known as the largest TRADOC (Training and Doctrine Command) site, the Army's largest maneuver area, and the country's largest contiguous tract of open airspace.
It's about 0.00000010 times as big as Grand Canyon National Park.
In other words, 51 squares is 0.00000009609507570 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 10,406,360.50 times that amount.(Coconino County and Mohave Counties, Arizona, near Fredonia and Grand Canyon, Arizona)
Containing the 446 km (277 mi) Grand Canyon gorge, Grand Canyon National Park covers 530,724,291 squares.