SHAREON FACEBOOK PIN IT SHUTTERSTOCK 20. Hot Springs National Park Arkansas The top tourist attraction in The Natural State (fitting nickname, right?) is the 15th-most-visited national park in the country, hosting nearly a million-and-a-half visitors every year. And while the historic “Bathhouse Row” -- where you can bathe in the healing natural waters of the hot springs -- might make for a rejuvenating weekend getaway, you gotta admit it still smells kinda like Bart Simpson pulled a prank in the middle of the street. And for that, it's number 20. CONTINUE READING SHAREON FACEBOOK PIN IT FLICKR/VOICESBEYOND 19. Cuyahoga Valley National Park Ohio Is anyone surprised that a national park with the same name as a river that once caught fire includes an old Superfund site? And we’re not talking about the former location of the Richfield Coliseum, which housed the perpetually toxic Cleveland Cavaliers, although it's actually in the park too. No, we’re talking about the old Krejci dump. But why focus on 47 acres of toxic waste, when the CVNP boasts 33,000-acres (!!) of gorgeous waterfalls, caves, biking/horse trails, and historic sections of the Ohio and Erie canal. SHAREON FACEBOOK PIN IT SHUTTERSTOCK 18. Badlands National Park South Dakota The only National Park so awesome Bruce Springsteen wrote a song about it (that’s what that song is about, right?) is also the place where you’re most likely to find ancient dinosaur bones. The 28-37 million-year-old fossil deposits make this one of the most treasured archeological sites in America. Although if fossils aren’t your thing, perhaps unusual rock formations and sprawling prairies full of bison and bighorn sheep are, 'cause the Badlands has those too. SHAREON FACEBOOK PIN IT SHUTTERSTOCK 17. Haleakala National Park Hawaii If “climbing an active volcano” is at the top of your bucket list, well, it probably shouldn't be -- since, ya know, it involves climbing an ACTIVE VOLCANO. But if you still insist, the 10,023ft Haleakala Mountain in the southeastern part of Maui Island is your spot. It's got tons of hiking trails that are open to the public, and is home to more endangered species than any other US park. RELATED The World's 20 Best Skylines, Ranked SHAREON FACEBOOK PIN IT FLICKR/RARVESEN 16. Olympic National Park Washington We’d like to think this is the fifth-most-visited national park in the nation for reasons other than the fact that it borders the Twilight fan-mecca that is Forks, WA. Like, oh, maybe because it contains the ONLY temperate rainforest in the contiguous US, plus active tide pools and the Olympic Mountain range. But that’s probably just a bonus for people coming to see La Push. SHAREON FACEBOOK PIN IT FLICKR/DAVE SOLDANO 15. Rocky Mountains National Park Colorado No, this park doesn’t encompass the ENTIRE Rocky Mountains, but rather a 415sqmi section of the Colorado Front Range. Split by the Continental Divide, it's almost two parks in one; the western side is the green paradise of vegetation, while the eastern half is the arid, mountainous region. In addition to encompassing 150 lakes and 359 hiking trails, RMNP's also a peak bagger's paradise -- there are over 60 mountains taller than 12,000ft.