10 affordable last-minute summer vacations

The shadows are slightly longer. The evenings are a little cooler. The crickets are starting to chirp their rendition of "September Song." Too late to plan a summer vacation, right? Nope. You've got an entire month of summer left and we want you to take it to the limit.

With that in mind, we've done some homework for you and come up with 10 amazing vacations right here in the U.S. that are still available and affordable over the next few weeks. That dream beach, national park, big-city blowout, or theme park adventure is within reach if you're flexible, imaginative, and savvy--a.k.a., a Budget Traveler.

See the last-minute vacations 

Yellowstone National Park: Idaho, Montana, Wyoming

Who's up for jaw-dropping scenery, warm western hospitality, and the closest thing to a safari experience that the lower 48 can offer? Best known for the Old Faithful geyser, which won't disappoint with its spectacular display, Yellowstone is also home to 1,000 miles of hiking trails, 67 species of mammals (including bears, moose, and, thanks to a successful reintroduciton in 1995, more than 300 wolves), and ranger programs such as walks, hikes, and campfire programs that can help you get the most out of this crown jewel of the national park system.

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Stay: Located three miles from the west entrance to Yellowstone National Park, Yellowstone Lodge offers Wi-Fi, complimentary continental breakfast, a heated pool, and access to a business center and coin-operated laundry facilities (251 S. Electric St., West Yellowstone, Mont., yellowstonelodge.com, from $149).

Myrtle Beach: South Carolina

If you want a dreamy beach vacation, you haven't missed the boat! Myrtle Beach's miles of sand, wildly popular boardwalk, charter fishing expeditions, and Ripley's Aquarium (where you can get nose-to-nose with sharks) will keep you busy while the sun shines, and its world-class eateries roll out an irresistible southern-style welcome with local micro-brews, seafood buffets, and oceanfront tables.

Stay: Westgate Myrtle Beach Oceanfront Resort provides beach access and ocean views, a heated outdoor pool, heated "lazy river," kids' water play area, and a "kids eat free" policy (415 South Ocean Blvd., Myrtle Beach, S.C., wgmyrtlebeach.com, from $79).

Great Smoky Mountains:Tennessee

America's most popular national park, a major theme park, and miles of trails and streams for under $100 per night? Yup. Head to the Great Smoky Mountains National Park for fishing, hiking, and scenic drives like the six-mile Roaring Fork Motor Nature Trail, and don't forget to spend at least one day at 150-acre Dollywood for authentic Tennessee music, food, and, of course, thrill rides such as the Wild Eagle and Mystery Mine.

Stay: The Park Vista-a DoubleTree by Hilton Gatlinburg features two restaurants, an indoor pool, and mountain views (705 Cherokee Orchard Road, Gatlinburg, Tenn., doubletree3.hilton.com, from $89).

Chicago: Illinois

A major American city that is as affordable as it is friendly, Chicago welcomes visitors from every corner of the world with its second-to-none theater, improv comedy such as Second City, the unparalleled Art Institute museum (where you'll find Edward Hopper's moody diner painting, Nighthawks, and Georges Serraut's ground-breaking pointillist masterpiece, A Sunday Afternoon on the Island of La Grande Jatte, blues venues such as House of Blues, and its rollicking Navy Pier along Lake Michigan.

Stay: The Allerton Hotel on Magnificent Mile is smack in the middle of a shopper's mecca. This full-service hotel evokes the spirit of 1920s Chicago with its classic facaade, but has earned awards for its sleek, inspiring interior design (701 N. Michigan Ave., Chicago, theallertonhotel.com, from $137).

Mammoth Cave National Park: Kentucky

If natural history with an air of mystery is your thing, Mammoth Cave National Park may be your perfect last-minute vacation. The world's longest cave system, these limestone caverns can be navigated with the help of park rangers, and programs range from the tried-and-true, one-of-a-kind major paths (ideal for all ages and interest levels) to muddier, darker options that the more adventurous among you will revel in. This time of year, lodging near the park tends to fill up, but you can still find affordable options a short drive away.

Stay: Super 8 Munford is about a half-hour drive from Mammoth Cave National Park, with other notable caves in the vicinity as well; it offers a complimentary SuperStart breakfast, free Wi-Fi, and kids under 17 stay for free (88 Home Run Rd., Munford, Ky., super8.com, from $49).

Morro Bay: California

Before you cross the California coast off your to-do list for this year, know that Morro Bay, on the central coast not far from the sprawling Hearst Castle, can still be a bargain for August vacationers. With a world-class natural history musem, iconic Morro Rock, a beautiful harbor, and, oh yeah, the world's largest ocean just down the street, Morro Bay remains one of the Golden State's "hidden gems."

Stay: Comfort Inn Downtown is located in the heart of this welcoming coastal town with easy access to Morro Rock and other sites; you'll get a complimentary breakfast that goes well beyond typical free fare, including eggs, waffles, and other hot favorites (590 Morro Ave., Morro Bay, Calif., comfortinn.com, from $106).

Berkshire Mountains: Massachusetts

If you don't want to have to decide between great museums and relaxing mountain hikes, book a week in western Massachusetts, where you can revel in both. Explore artist Sol LeWitt's wall drawings--not to mention one of the U.S.'s largest collections of modern art--at the Massachusetts Museum of Contemporary Art in North Adams; see the comprehensive collection at the Sterling and Francine Clark Art Institute in Williamstown; and step back into 19th-century New England by crossing the border into Bennington, Vt., for the Grandma Moses collection at the Bennington Museum and Grandma Moses Schoolhouse.

Stay: Holiday Inn Berkshires is in North Adams, Mass., centrally located for dividing your day among art, theater, and nature; there's an on-site restaurant and indoor pool (40 Main St., North Adams, Mass., holidayinn.com, from $119).

Mackinac Island: Michigan

Michigan's lakeshores aren't exactly under the radar--Midwesterners have long regarded locales like the Upper Peninsula and Mackinac Island as the best places for a family vacation. But they remain underrated among travelers from farther away and if you're still on the fence about where to spend a week before school starts, head for Mackinaw City, a half-hour ferry ride from Mackinac Island's Victorian homes and stunning state park.

Stay: Days Inn and Suites Mackinaw City Bridgeview Lodge includes complimentary Daybreak continental breakfast, free Wi-Fi, a pool, and puts you near Lake Huron, Lake Michigan, and local shopping (206 N. Nicolet St., Mackinaw City, Mich., daysinn.com, from $88).

Acadia: Maine

The mountains, the ocean, the pine-scented air! You probably thought a trip to Acadia National Park was off-limits this late in the season. But this popular, well-booked area is still a possibility if you're willing to book loding a short drive away. Acadia is for travelers who like their seaside a little rough around the edges, with cliffs, trails, and

Stay: Ramada Ellsworth is 18 miles from Bar Harbor, walking distance from an L.L. Bean outlet, and offers a pool, free Wi-Fi, and complimentary continental breakfast (215 High St., Ellsworth, Maine, ramada.com, from $129).

Orlando: Florida

If you've been putting off a trip to theme-park paradise, late August offers some nice discounts on hotel rates. Sure, it's hot down here in summer, and school is just a few weeks away, but paying less than $75 a night to stay near Universal Studios Florida, SeaWorld Orlando, and Walt Disney World will take the sting out of some of the park admission, which can top $80 a day for adults.

Stay: Wyndham Orlando Resort is less than 20 minutes from the major parks, includes three restaurants, three pools, a health club, and even an on-site ice cream parlor (8001 International Dr., Orlando, Fla., wyndham, com, from $67).