The Great Smoky Mountains National Park, a UNESCO World Heritage Site, is located in which country?

United States of America

The correct answer is Option (1) → United States of America

The Great Smoky Mountains National Park is located in the United States of America.

It spans the border between the states of North Carolina and Tennessee. It is famously known for its lush forests, diverse wildlife, and the "smoky" mist that often clings to its peaks—a natural vapor released by the park's dense vegetation.