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From a floating B&B to desert cave, TripAdvisor has rounded up some of the more unusual places where you can lay your head.

1. Dog Bark Park Inn, Cottonwood, Idaho
Travelers staying at this place, 200 miles north of Boise, aren't worried to be in this doghouse. The giant dog B&B entertains guests looking for a barking good time and some tail-wagging fun. The owners even gave the giant beagle a nickname: "Sweet Willy." You can stay a loft room located in the pooch's head --and of course, pets are welcome. "A noble and absurd undertaking - made with love and care - Sweet Willy was fun, silly and cozy," said a TripAdvisor traveler.

2. Kokopelli Cave Bed and Breakfast, Farmington, New Mexico
This is luxury cave dwelling. Located 70 feet below the ground near the Four Corners region of the U.S., travelers can stay in this one room, 1,650 square foot B&B that boasts Southwestern style furniture and decor, a full kitchen, washer/dryer, and even a relaxing flagstone hot tub.

3. El Cosmico, Marfa, Texas
Marfa, the artist haven in southwest Texas, is filled with funky hotels and hangouts. But few properties give travelers the chance to stay in a trailer, tent or teepee. And it's hardly roughing it. Restored trailers on this 18-acre property are decked out in retro birch interiors, and come with everything to keep you cool during the hot desert days and warm on those chilly nights.

4. Yankee Ferry, Red Hook, New York
A stay in the Big Apple deserves a special kind of B&B. Tucked in Brooklyn's hip Red Hook neighborhood, visitors can stay aboard this 1907 steel-hulled passenger vessel.  Have a drink at the quirky Sunny's bar, and then come back to be softly lulled to sleep by the gentle waves of Hudson River…