Antelope Canyon is a stunning slot canyon located on Navajo land in Arizona and offers two main sections: Upper Antelope Canyon, known for its ground-level entrance and colorful light beams, and Lower Antelope Canyon, with its spiral rock arches and challenging terrain. Guided tours are required to explore these breathtaking canyons, where visitors can witness the unique interplay of light and shadow on the canyon walls.

I've included this slot given its the most iconic, however funny story -- I've actually never hikes this one. I do have other Navajo canyons on my to-do list, though.