The Huntsville-based US Space & Rocket Center boasts one of the largest collections of rockets and space memorabilia in the world.It has rockets, rocket-launch simulators, and the Apollo 16, and it even offers a Space Camp.Denali National Park is home to North America's highest peak at 20,320 feet.Even if you don't venture the climb, the park has an extraordinary six million acres of wildland.The Grand Canyon is one of the most-visited natural wonders in North America for a reason.Between its immense size and spectacular views, this natural phenomenon is anything but ordinary.This active Blanchard Springs Cavern system contains three levels of ever-changing crystalline formations.It's believed to have been formed by an ongoing mountain spring that pours into a trout pond below the cave.California is full of attractions from the staggering Mariposa Grove to the trendy draws of Coachella. But Universal Studios Hollywood is one of its most over-the-top of the bunch.Between the Wizarding World of Harry Potter and the famous studio tours, there's plenty to do and see at the park.Red Rocks Amphitheater is a live music venue housed in a geological phenomenon.Over the years, it's hosted famed musicians like The Beatles and Sting.Gillette Castle is a 24-room mansion nestled on a 184-acre estate that was built by actor William Gillette in the early 1900s.The Dover International Speedway, nicknamed the Monster Mile, is a great place to watch NASCAR races.Visitors can enjoy its 46-foot fiberglass monster, Miles, who's become the speedway's official mascot.With four theme parks and plenty of resorts, Disney World is easily the most extravagant tourist attraction in Florida.Jekyll Island makes the list for its extravagant history.It was bought by a group of millionaires who called themselves the Jekyll Island Club before it was sold to the state of Georgia in 1947.Volcanoes National Park offers viewers an up-close-and-personal look at an active volcano with stunning surroundings. Perrine Bridge is a popular BASE jumping destination.The 1,500 foot-long bridge spanning Snake River Canyon is a picturesque place to both take in the views and get an adrenaline rush.The Willis Tower, formerly known as the Sears Tower, is the second-tallest building in North America at 110 stories tall.It features a Sky Deck, which allows visitors to peer over protruding glass that sits 1,353 feet in the air.The Indianapolis Motor Speedway, the most famed automobile racetrack in the world, hosts the Indy 500 each year, which draws over 200,000 attendees on average.Thousands of people visit the Field of Dreams movie site in Iowa each year.The baseball field was built for the popular Hollywood movie and remains intact to welcome visitors and baseball fans. The Kansas Underground Salt Museum in Strataca mines started as one of the largest bedded salt deposits in the world (27,000 square miles).Today, the museum draws visitors with guided underground tours, train rides through the mine, and a Salt Safari.What started as a small Kentucky woodworking shop became the home of the iconic wooden baseball bat in 1884. Baseball fans can wander through the exhibits, and no one can miss the 120-foot-tall replica of Babe Ruth's Louisville Slugger that rests against the exterior of the building. New Orleans is famous for its Mardi Gras celebrations, but Bourbon Street is bustling all year long.It's one of the oldest streets in North America, and it's a hotbed for live jazz and raucous nightlife.Maine is known for its natural parks and mountains, but Stephen King's ominous-looking mansion — complete with a wrought-iron fence decorated with bats and spiders — is a must-see attraction for horror fans. As anyone who attends Johns Hopkins University knows, the George Peabody Library is one of the most famous in the country.It's even become a popular choice for wedding venues due to its striking architecture and ornamental balconies.Fenway Park has dubbed itself America's most beloved ballpark.With a dedicated fan base and a rich history, it's definitely worth checking out if you're in the Boston area.Mackinac Island manages to be both extravagant and quaint. No cars are allowed on the island, but you can take a carriage ride to explore the fudge shops and family-owned lodging.Minnesota is home to stunning national parks and the Boundary Waters, but the sprawling Mall of America is its most extravagant attraction.It hosts 400 events and 40 million shoppers per year on average. These ruins can be difficult to locate but they're worth the trip.The group of columns is all that remains from a mansion that burned down in a fire.Ha Ha Tonka Castle Ruins is a geological treasure with fantastic hiking.The actual ruins are from a European-style castle that burned down in a fire, but the state park also features a natural bridge, bluffs, sinkholes, and more. Glacier National Park has a 52-mile highway crossing the Continental Divide at Logan Pass called Going-to-the-Sun-Road.It takes two hours to drive the 50 miles of jaw-dropping views.Look out for waterfalls and mountain goats as you enjoy the winding road into the sky. Carhenge features 39 cars stacked on top of one another in an artistic recreation of Stonehenge, a prehistoric monument in the UK. Sin City is the most over-the-top spot of Nevada.With a slew of glittering resorts, restaurants, and casinos, it's the place to go for a good time, and its bright lights can even be seen from space.Visitors can either take a guided tour or drive themselves down Mount Washington Auto Road.It isn't a relaxing drive though, the climate changes along the winding road and dramatic cloud formations and crazy winds are to be expected.This resort city is known for its casinos, robust nightlife, and famous boardwalk.The Tularosa Basin is home to one of the world's greatest natural wonders.White Sands National Park is home to enormous rolling dunes of white gypsum sand spanning nearly 300 square miles.It may make native New Yorkers groan, but there's no attraction more over-the-top and ostentatious than Times Square.This 8,000-estate home built by George Vanderbilt in 1889 bills itself as America's largest home.The grounds are so expansive that a full tour takes several hours.The Enchanted Highway features the world's largest collection of scrap-metal sculptures.They can be seen from a 32-mile stretch of I-94.Cedar Point calls itself the roller coaster capital of the world.It has 18 coasters, 28 thrill rides, and 19 kid-friendly attractions among other unique experiences.Most art museums in North America wouldn't be classified as over-the-top, but Philbrook is housed inside an opulent Renaissance-style villa sitting on 23 acres of gardens. Crater Lake was formed over 7,700 years ago after a violent eruption collapsed a tall peak.Now, it's the deepest lake in the United States at 1,943 feet.The Pennsylvania State Capitol is one of the most striking in the country, with stained glass, paintings, and Renaissance designs.The centerpiece was inspired by Michelangelo's design for St. Peter's Basilica in Rome.The Breakers is the largest of Newport's mansions or cottages that belonged to the Vanderbilt family.South Carolina is home to many charming vacation attractions from Charleston to Hilton Head, but one of its most surprising features is a tree. Angel Oak towers at over 60 feet tall, and experts estimate that it's between 400 and 500 years old.Wall Drug Store, informally known as simply Wall Drug, started as a small neighborhood shop in 1931.But today it's a 76,000-square-foot roadside attraction where weary road-trippers can stop in for food, refreshments, and the store's legendary free ice water.Nashville's Centennial Park hosts a full-scale replica of Athens's Parthenon. It even includes a 42-foot replica of the statue of Athena.Located off of Route 66, Cadillac Ranch is one of the funkiest roadside attractions in the country. Three San Francisco artists created the sculpture, which features colorful Cadillac cars stuck into the desert ground, in 1974, and it's still attracting tourists today. Inspiration Point in Bryce Canyon National Park is a memorable and extraordinary natural attraction.Visitors can gaze across the three levels of colorful hoodoos (also known as tent rocks).Hildene, the Lincoln Family's summer home, is a Georgian revival mansion that belonged to the 16th president's son.The estate features an observatory, formal gardens, and a farm, and it's open for tours.Colonial Williamsburg is committed to recreating 18th-century life.Many of the town's original buildings are still standing, horse-drawn carriages travel down the roads, and costumed reenactors lead classes in the shops. The enormous Museum of Flight features flight simulators, over 175 aircrafts and spacecrafts, and dozens of exhibits.The New River Gorge Bridge is one of the most photographed spots in West Virginia. It has the longest steel span in the Western hemisphere, and it towers at over 800 feet above the water.Residents of Fayetteville, West Virginia, even celebrate Bridge Day to honor it.Lambeau Field Atrium, home of the Green Bay Packers, is 5 stories high, with a number of dining and retail options.All of Yellowstone National Park belongs on this list, but the Upper Geyser Basin, home to Old Faithful, has the largest concentration of geysers in the world.From the Washington Monument to the Lincoln Memorial, the National Mall is a powerful place to bask in history and admire striking architecture.