The Grand Canyon of Texas: Palo Duro Canyon. They also claim it is the second largest canyon in the US, second only to the Grand Canyon. Maybe, but it is a distant second! It doesn’t quite live up to that hype but it is a beautiful place. Soft layers topped with more erosion resistant caprock make for cool formations and hoodoos. Cliffs look like layer cakes where the river has sliced through 800 feet of colorful layers of soil. The hike to lighthouse rock made for a great walk with a beautiful view of the valley from its pedestal