Antelope Canyon is only 15 minutes down the road from Horseshoe Bend and offers the most incredible rock formations on the trip. Walking along the dry river bed admiring the rocks that have been cut out from raging waters is breathtaking.
The only way to experience this is through a guided tour which I recommend you make a reservation for at least a week in advance. We made reservations the day before but got lucky from a cancellation. If you can’t get a reservation show up anyways and you might get to go. Note that the tour company is limited on the number of people they are able to take each day.
Pro Tip: Ask your tour guide for the best phone filter before starting your tour.