Big Bend isn’t messing around when it calls itself big (because the park named itself, obviously). At over 800,000 acres, it’s one of the largest national parks in the entire country. Lucky for you, it’s also one of the most desolate, with only 300,000-350,000 visitors annually. It doesn’t get more scenic, or more serene, than the Santa Elena Canyon, the enormous winding valley that separates the US and Mexico. Flowing with the waters of the Rio Grande River and faced with 1,000ft cliffs, you’ll want to break out the selfie stick for this one.