Trivia: What is the smallest U.S. national park?
Hawaiʻi Volcanoes
Carlsbad Caverns
Capitol Reef
Gateway Arch
The correct answer is Gateway Arch
So why is this answer correct? : Gateway Arch National Park in St. Louis is the smallest national park in the system, covering just over 90 acres. It’s also one of the country’s few urban national parks and includes green forestland, riverfront access, and five miles of recreational trails that are home to diverse native plant species. Of course, the centerpiece of the park is the 630-foot-high (and 630-foot-wide) Gateway Arch — the tallest human-made monument in the U.S.