When planning a vacation, why stay at a Holiday Inn or a motel? If you're going big, why not go all the way in and stay at a world-class resort? Of course, there are hundreds of luxurious hotels and resorts to stay at around the world, but you could make your vacation truly memorable by staying somewhere especially unique.

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Whether you're interested in bathing in wine or coffee, sleeping in a room fully immersed underwater, or spending a night under the starry sky in a glass igloo, there are plenty of opportunities for you out there. Here's a list of some of the strangest resorts in the world you should add to your bucket list.

10 The Omni Grove Park Inn, United States

Located in Asheville, North Carolina, the Omni Grove Park Inn is a luxurious hotel known for its plentiful golf courses and its subterranean spa. It's one of the only places in the country you can go to a spa completely surrounded by cavernous rock. Containing twenty different water features, the spa has mineral pools, private quarters for men and women, saunas, and eucalyptus steam rooms.

Plus, you won't have to worry about children interrupting your relaxation time, as the spa is explicitly only for adults. The golfing is also legendary, even played on by PGA gold champions. They have a 6,400 square foot championship course and much more.

9 Yunessun Spa Resort, Japan

If you're interested in a truly unique spa experience, look no further than the Japanese Yunessun Spa Resort. This resort has both indoor and outdoor spas, access to hot springs, mineral pools, and even water parks. You can indulge outdoors in a spa while watching people go down the Rodeo Mountain water slides.

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There are also scenic waterfalls and rock pools, an elaborate way of providing more water-focused activities. But the Yunessun Spa Resort is best-known for its unique wine, coffee, green tea, and Japanese sake baths. You can take them solitary or you can swim in a pool of wine with others. It's said to be good for the skin.

8 Sheraton Huzhou Hot Spring Resort, China

Found in China, Sheraton Huzhou Hot Spring Resort is known for its elaborate donut-like shape. Even if you don't get the chance to stay overnight in this dreamy resort, it's worth taking a drive by it and snapping a few photographs of the glamorous architecture.

It is constructed of two overlapping towers, Crystal and Jade, to form its unique curved shape, and it towers at 27-stories high in the sky. In addition to having more than 280 rooms available to its guests, the Sheraton Huzhou Hot Spring Resort has its own private beach, infinity pool, and even a built-in Wedding Island.

7 Woodlyn Park Resort, New Zealand

Fantasy fans and Lord of the Rings fans, look no further than Woodlyn Park for a truly unique experience. The homes are modeled after Hobbit homes and many are built conjoined together. All the homes are built out of recycled parts. You could be sleeping in a Hobbit home built from an aircraft or a vehicle.

The Waitomo Express is a unit actually constructed from a train car. Other spaces are built inside of an old aircraft and or even a bus. It's truly a special experience to stay at Woodlyn Park. Other units include freighters and boats. Woodlyn Park is a gem in New Zealand and a spectacular resort.

6 The Manta Resort, Tanzania

On Pemba Island is a dreamy resort perfect for people who are keen to escape the day-to-day life and dizzying noise pollution of a crowded city. The Manta Resort is meant as a resort where you unplug from the rest of the world. Its simplicity is that it is on a remote island far away from civilization.

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If you choose to book the underwater room, you will be taken on a boat to a private island with a room that goes beneath the water. You'll be in the middle of crystal blue waters and allowed to watch the marine life float by. You will also be provided with fins and snorkels!

5 Kakslauttanen Arctic Resort, Finland

Located in the Finnish Lapland, you can stay at the Kakslauttanen family hotel and stay in a luxurious glass igloo during the time when the Northern Lights are in the sky! The igloos come in different sizes with accommodations for families, friends, and even romantic quarters for people on a couples getaway.

Saunas and bathrooms are available in a separate building, but if you rent a four-person igloo it does include a shower and restroom. Another popular choice is a Kelo glass house, which include kitchenettes, saunas, and a glass roof so you can still view the majestic skyline and the wilderness nearby.

4 Atlantis, The Palm Resort, UAE

Atlantis, The Palm Resort in Dubai is a five-star luxury resort that has made waves in popular culture. Kim Kardashian West has stayed in the hotel, it has been featured on multiple reality shows including The Amazing Race and The Real Housewives of Beverly Hills.

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The Palm Resort has more than 65,000 animals you can visit, including a dolphin bay and a sea lion point. There are customized dives for different people depending on your skill level and interest in oceanic life. It also has a giant water park as part of the resort, with more than 17 different attractions.

3 InterContinental Shanghai Wonderland, China

The InterContinental Shanghai Wonderland cost more than $300 million dollars to create but it's one of the world's only underground hotels. 16 of the hotel's 18 floors are underground and two are actually underwater. In addition to being built into a rock quarry, if you're in one of the underwater rooms, you're privy to your own private saltwater aquarium show.

Plus, the rooms have personal theaters and most are situated so you can enjoy nightly light shows. Guests are also able to personalize and customize light shows for special occasions. Guest rooms are typically composed of wood or stone and even the bathrooms are extra fancy, with heated toilet seats.

2 WeeCasa, United States

Are you more interested in an intimate and cozy setting for your retreat than an over-the-top fancy stay in a grand hotel? If so, WeeCasa is a great, quirky, little place to stay. WeeCasa is a tiny resort hotel. The guest rooms are actually teeny houses situated close to each other on the property, as if in a neighborhood.

Located in Colorado, you'll have close access to the river, even private river access depending on which room you book. Each tiny house optimizes the usage of its space fully and completely. Almost everything is provided for you, apart from food and media devices. For fans of Lord of the Rings, there are even houses in the design of hobbit homes!

1 Seaventures Rig Resort, Malaysia

Have you ever considered staying overnight in an old oil rig in the middle of the ocean? That's the experience you can emulate at Seaventures Rig Resort in Malaysia. Enjoy the views of the beautiful Celebes Sea and plentiful diving opportunities in one of the best diving spots in the world.

The rooms are fairly sparse, but if you're visiting Seaventures, odds are you're there for the sights and the diving, not so much the room amenities. You can also ride boats that dock nearby so you can take in some of the other scenery in the area, but the main attraction is in the many diving opportunities.

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