If these don't sound like particularly appealing digs for your next trip, read on; you just might be surprised. All of these places are actually hotels, and they're just a few of the weird and wacky lodging options on TripAdvisor's list of the world's 10 quirkiest hotels. Compiled by the site's editors and members, the list includes everything from ice hotels to treehouses. Choose one of these for your next trip, and your lodging will be just as unique as the destination you're visiting.

1. Forget the Alamo, Remember the Aurora: Forget-Me-Not Lodge and Aurora Express
Where: Fairbanks, Alaska
Average Nightly Rate: $117
This incredible B&B is set on the picturesque hills of Fairbanks, Alaska, where guests enjoy amazing views and unique accommodations in restored antique Alaska Railroad Pullman cars. Each car is masterfully decorated with a Gold Rush-era theme for a wonderfully authentic railroad experience, and according to travelers, the breakfasts just can't be missed. As one TripAdvisor member said, "Make a reservation, select a room and get ready for a terrific ride."

2. Icy Reception: Icehotel Sweden
Where: Jukkasjarvi, Sweden
Average Nightly Rate: $447
Besides rooms, the Icehotel Sweden offers a completely icy experience with everything from an art exhibition to a chapel -- all, of course, carved from ice. Travelers break the ice with fellow guests over a cold one at the icebar, with cool blue lighting, while chilling out on sculpted ice stools. As one TripAdvisor member said, "The hotel is absolutely amazing -- built completely from ice, and maintained at -5 C."

3. Repeat Offender: Malmaison Oxford Castle
Where: Oxford, England
Average Nightly Rate: $252
Malmaison Oxford Castle, a converted prison, is where lifelong dreams of becoming institutionalized come true. Unlike an actual jail, the accommodations are outstanding, but when you are ready to escape, Oxford features many great shops and restaurants nearby. According to a TripAdvisor traveler, "Wow, it was absolutely amazing -- the quirkiest hotel I have ever stayed in -- amazing staff, amazing food and the nicest bathroom."

4. Ruffing It: Dog Bark Park Inn
Where: Cottonwood, Idaho
Average nightly rate: $88
If you like canines, this hotel is your dog. The not-so-subtly named Dog Bark Park Inn is a humongous dog-shaped building that features a completely dog-themed interior.

You'll get better than dog food at this bed and breakfast, however, as well as beautiful views of the mountains and farmlands. One TripAdvisor member said, "This is a 'must-go' for anyone wanting a laid-back, nowhere else kind of experience in the most beautiful part of Idaho."

5. Book Smart: McMenamin's Kennedy School
Where: Portland, Oregon
Average Nightly Rate: $114
You're never too cool for school at Kennedy, as the authentic classroom feel of a converted schoolhouse offers guests a trip down memory lane. Terrific accommodations, including blackboards in the rooms, a movie theater and a soaking pool in the former teacher's lounge, make Kennedy an honor roll quirky hotel. According to one TripAdvisor traveler, "This place is so cool, I'd go back to Portland just to stay there."

6. Caving Inn: Gamirasu Cave Hotel
Where: Ayvali Koyu, Urgup, Turkey
Average Nightly Rate: $125
A cave dwelling and restored monastic retreat, the Gamirasu Cave Hotel features windy passages and Cappadocia-furnished rooms overlooking the village of Ayvali. A layer of volcanic rock, also known as tufa, keeps the caves warm in the winter and cool in the summer. As one TripAdvisor traveler said, "Gamirasu is a fantastic place with unique, comfortable cave rooms that come with wonderful extras like a set of slippers to warm your feet!"

7. Fit (and Priced) for a King: King Pacific Lodge
Where: North Vancouver, British Columbia, Canada
Average Rate: $2,510
Only reachable by seaplane, the King Pacific Lodge features five-star accommodations on a floating barge. The all-inclusive lodge provides remarkable food, spectacular views, an amazing spa, a number of outstanding outdoor activities -- including whale-watching, hiking, kayaking and salmon fishing -- and unparalleled serenity. As one TripAdvisor traveler said, "To say that this is a unique and spectacular place barely does it justice."

8. Wild Ride: Canopy Rainforest Treehouses and Wildlife Sanctuary
Where: Tarzali, Queensland, Australia
Average Nightly Rate: $197
Set high on stilts amid the canopy of a rain forest, the Canopy Rainforest Treehouses and Wildlife Sanctuary (formerly known as Fur 'n' Feathers) offers an authentic nature experience complete with spectacular views and peaceful seclusion. If you stay at these rain forest treehouse cabins, however, be prepared to share space with wildlife of all kinds, from platypusses to parrots. According to one TripAdvisor traveler, "If you like your wildlife wild then you will love this place."

9. Fit to a Teepee: Wigwam Motel
Where: Holbrook, Arizona

Average Nightly Rate: $45

The Wigwam Motel is a series of teepee-style cement tents along the legendary U.S. Route 66 that offers kitschy fun. A throwback to the 50's with classic cars parked outside, an old railroad nearby and vintage accommodations inside the teepees, Wigwam is a great stop for travelers looking to step back to simpler times. According to a TripAdvisor traveler, "The Wigwam Motel is a unique retro motel, one of the few of its kind left in the U.S.A."

10. Royal Style: The Witchery by the Castle
Where: Edinburgh, Scotland
Average Nightly Rate: $414
Part medieval, part Gothic and all opulence, The Witchery by the Castle on Edinburgh's Royal Mile offers an over-the-top experience for its guests. In a historic 15th-century building that is only a stone's throw from famous Edinburgh Castle, visitors will enjoy an amazing array of antiques and an amorous ambience. According to one TripAdvisor traveler, "The decor is outstanding, real thought and effort into all the little extras. Has to be the most unique hotel we've ever stayed in."