It's about 100,000 times as big as Fort Knox
In other words, 30,000 acres is 103,000 times the size of Fort Knox, and the size of Fort Knox is 0.00000971 times that amount.(a.k.a. the United States Bullion Depository, a.k.a. "Gold Vault") (Kentucky)
The United States Bullion Depository, commonly referred to by the metonym "Fort Knox" (in spite of the fact that the Depository is not located on the Fort proper), measures 32.0 m (105 ft) by 36.9 m (121 ft), for a total area of about 0.2920 acres. The Depository is most famous for housing the largest portion of the national gold reserve, but has also temporarily housed the original US Declaration of Independence, an original copy of the US Constitution, and other important documents, kept there for safe keeping during World War II.
It's about one-one-hundred-fifty-thousandth as big as Russia
In other words, 30,000 acres is 0.0000071004781 times the size of Russia, and the size of Russia is 140,835.59 times that amount.(a.k.a Российская Федерация, formally the Russian Federation, a.k.a. Россия)
The largest country in the world, Russia measures 4,225,067,600 acres. Russia spans eleven time zones and holds more forest than any other country in the world, as well as lakes and rivers containing totaling 25% of the world's fresh water supply.
It's about 250,000 times as big as a Basketball court
In other words, 30,000 acres is 244,948.4536 times the size of a Basketball court, and the size of a Basketball court is 0.000004082491583 times that amount.(per NBA regulation)
Per NBA rules , a basketball court should measure 29.5656 m long by 16.764 m wide, for a total area of 0.12247474750 acres. The first basketball game, held in a Springfield Massachusetts YMCA, was played on a court half the size of today's NBA standard and ended with a score of 1-0.
It's about 350,000 times as big as an IMAX screen
In other words, 30,000 acres is 342,800 times the size of an IMAX screen, and the size of an IMAX screen is 0.000002917 times that amount.(standard)
An IMAX movie theater screen measures 22 m (72 ft) by 16 m (52 ft) for a total area of 0.08752 acres. Because the film used in an IMAX movie is more than eight times larger than regular film, the platters of a two-and-a-half hour feature film can weigh up to 250 kg (550 lbs).
It's about 450,000 times as big as a Tennis court
In other words, 30,000 acres is 465,384.61 times the size of a Tennis court, and the size of a Tennis court is 0.0000021487604 times that amount.(per ITF specification; for doubles)
Per International Tennis Federation Rules of Tennis 2009, a doubles tennis court should measure 23.7744 m long by 10.9728 m, for a total area of about 0.064435199 acres. Courts may be surfaced with crushed red stone, shale, brick, hard-soil grass, or asphalt.
It's about 0.0000008 times as big as The Land area of Earth
In other words, 30,000 acres is 0.00000081513 times the size of The Land area of Earth, and the size of The Land area of Earth is 1,226,800 times that amount.The Earth has a land area of 36,804,000,000 acres. Only an estimated one-eighth of this area — or 4,600,600,000 acres — is inhabitable by humans, with uninhabitable terrain such as deserts and high mountains covering the rest.
It's about 8,000,000 times as big as a Parking Space
In other words, 30,000 acres is 8,090,000 times the size of a Parking Space, and the size of a Parking Space is 0.000000124 times that amount.(a.k.a Parking Stall) (average; surface lot; North America)
An average-size parking space in a North American surface lot measures 0.00371 acres. Due to the high real estate prices at the time, parking spaces in a densely-populated part of Manhattan would sell for an average of $165,000 in 2007, with some spaces fetching up to $225,000.