What national park is located in Kentucky?

Mammoth Cave National Park is the correct answer because it is the only national park located entirely within the state of Kentucky. Established in 1941, this park is renowned for its extensive cave system, which is the longest in the world. The park encompasses more than 52,000 acres of protected land and offers unique geological formations, diverse ecosystems, and a variety of recreational activities. It is also recognized as a UNESCO World Heritage Site, highlighting its importance on both a national and global scale.

The other parks listed, while notable, are situated in different states. Great Smoky Mountains National Park is primarily located in North Carolina and Tennessee, Badlands National Park is found in South Dakota, and Yellowstone National Park spans the states of Wyoming, Montana, and Idaho. This distinction emphasizes Mammoth Cave National Park's unique status as Kentucky's representative of national parks.