1. Grand Canyon, Arizona This iconic natural wonder is known for its immense size and its intricate and colorful landscape.
2. Yellowstone National Park, Wyoming, Montana, and Idaho As the first national park in the world, Yellowstone is renowned for its geothermal features, including geysers like Old Faithful, hot springs, and fumaroles.
3. Yosemite National Park, California Known for its stunning granite cliffs, waterfalls, giant sequoias, and diverse ecosystems, Yosemite is a nature lover's paradise.
4. Maui, Hawaii Highlights include the scenic Hana Highway, Haleakalā National Park with its massive dormant volcano, and the beautiful beaches of Wailea and Kaanapali.
5. Great Smoky Mountains National Park, Tennessee and North Carolina Famous for its mist-covered mountains and rich biodiversity, the Great Smoky Mountains offer stunning vistas, lush forests, and an array of wildlife.
6. Zion National Park, Utah Popular activities include hiking the Narrows, a walk through a river within a deep canyon, and Angel's Landing, a challenging trail with breathtaking views.