Alabama State Parks,The first thing you notice about Cathedral Caverns is the massive entrance. The huge opening measures 126 feet wide and 25 feet high. And it gets even better. Inside the cavern, you will find Big Rock Canyon, Mystery River and some of the most beautiful formations Mother Nature has ever created. Among them, you will see Stalagmite Mountain, The Frozen Waterfall and Goliath, a huge stalagmite column that reaches the ceiling of the cave some 45 feet above!
Palo Duro Canyon State Park, in the panhandle south of Amarillo, is the "Grand Canyon" of Texas. The Canyon is 120 miles long, as much as 20 miles wide, and has a maximum depth of more than 800 feet. Its elevation at the rim is 3,500 feet above sea level. It is the second largest canyon in the United States.