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This is likely the most impressive sights in Big Bend National Park, up to 1000-foot-high vertical cliffs, there are not too many places like that in the rest of the US. The trail is less than a mile long and the views are gorgeous. You may have to cross a small muddy stream to get to the cliffs depending on the time of the year. These massive limestone cliffs are the sedimentary remains of an ancient shallow sea, and they were carved by the Rio Grande over the last 60 million years (they call it Rio Bravo in Mexico).