The area of Gettysburg National Military Park is 16.046 square kilometers.
The area of Horseshoe Bend National Military Park is 8,255,587.101696 square meters.
There are over 5,989 acres of land within the protection of the Gettysburg National Military Park. Hundreds more acres are protected around the park by historical covenants which prevent development and maintain the 1863 appearance of the park.
The area of Hallasan National Park is 153.11 square kilometers.
The area of Karoo National Park is 767.86 square kilometers.
The area of Arakwal National Park is 1,990,000.0 square meters.
The area of Otishi National Park is 3,059.731 square kilometers.
The area of Nki National Park is 3,093 square kilometers.
The area of Aggtelek National Park is 198.92 square kilometers.
The area of Springbrook National Park is 61.97 square kilometers.
The area of Reisa National Park is 803 square kilometers.
The area of D'Entrecasteaux National Park is 1,187.79 square kilometers.
The area of Kondalilla National Park is 3,270,000.0 square meters.