Antelope Canyon is probably the most photographed canyon in the world. Located in the Navajo Indian preservation, only guided tours are permitted. We took a trip to Antelope Canyon Tours. The tour lasts about an hour, and it takes ~20 mins one-way drive to reach the canyon. There aren’t any hikes, just simple walks in the canyon. Everyone is crazy running around and taking photos, so it does become a bit hard to enjoy in the mad rush. Even then, if you are in the area, I would recommend booking a tour in advance to visit the canyon.
I did the 23.4 miles rim to rim day hike through Grand Canyon during the last week of November (Thanksgiving weekend) 2017. Unlike most hikes like Mt. Whitney, the hard part (ascent) comes later, and therefore, it is easy to get trapped. Be confident of your fitness level before you try this.