From ice manors in Sweden to al fresco wooden lodges in Botswana to hanging pods in Peru, some hotels can make your trip unforgettable.
Here are the ones you need to visit during your lifetime.
Little Mombo Camp in Okavango Delta, Botswana.
Guests can watch lions and zebras pass while they eat breakfast at this hotel in Botswana, a landlocked country in southern Africa. Located in the Moremi Game Reserve, it offers outdoor pools and luxury tents with windows to watch the wildlife. It also has a conservation center where guests can learn about the animals. Cost per night: $1,750 per person.
Treehotel in Harrads, Sweden.
This adult tree house will make you feel like a kid again, nestled in the trees of a forest in Harrads, a village in Northern Sweden. Six "treerooms" and a sauna hovers in the branches 13 to 20 feet off the ground. They're all different shapes, from a UFO room that looks like an alien pod to a Mirrorcube with mirrors that reflect the forest and Lule River Valley. The treehotel is also environmentally friendly. Every cabin has hydroelectric heating and an electric-powered toilet that destroys waste at 1,110 degrees Fahrenheit. The pods are snug at 258 square feet, which is a little smaller than the average one-car garage. But that's obviously part of fun. Cost per night: $505
Skylodge in the Peruvian Andes.
If you don't have a fear of heights, you should stay in this transparent pod, one of three suspended on the side of an Andean cliff. To get to a pod, you need to hike up part of the cliff and then zip-line 1,000 feet over. Each of the "rooms" has four beds, a bathroom, and a small dining area that sits above it. The reward for conquering a fear of heights: stunning views of Peru's Sacred Valley. Cost per night: $300 per person.
The Whitepod in Les Cerniers, Switzerland.
15 "igloos" are part of this hotel that overlooks the the Swiss Alps, 4,000 feet above sea level. The domes, covered in white canvas, blend in with the snowy peaks. At night, they're lit by lanterns and heated by wood-burning stoves. Cost per night: Starting at $330 per person in winter; $235 per person in summer.
The Qasr Al Sarab Desert Resort in Anantara, Abu Dhabi.
Translated as "Mirage Place" in English, this resort sits in one of the largest sand deserts in the world. The 212-room hotel was built by 5,000 workers over three years. Some of its highlights include a lima bean-shaped pool, a fancy spa, and exquisite restaurants. By the shaded bar, you can watch the camels go by or stare out at the never-ending mounds of sand. Cost per night: From $2,160.
The Temple House in Chengdu, China.
Guests at this hotel can stay inside a 1,000-year-old Chinese temple that dates back to the Qing dynasty. Outside, there's a zen courtyard surrounded by orchids for meditation. Below the temple, there's a serene underground pool. If you're a foodie, you're in luck, because each room comes with complimentary plates of spicy sichuan noodles, chestnut salad, papaya-coconut panna cotta, mulberry leaf tea cakes, and sweet jelly with goji berries. Cost per night: From $222.
Seaventures Dive Resort in Malaysia.
Before it was a hotel, this was an abandoned oil rig in the Celebes Sea (between Borneo, the Philippines, and Indonesia). In 2008, it turned into a scuba diving hotel. After a night's sleep at the Seaventures Dive Resort, tourists can scuba and roam with the tropical fish and sea turtles. It's an incredible place to dive, with one of the world's richest marine ecosystems. Cost per night: Starting at $210, not including scuba excursions.
Weird Hotel in Sasebo, Japan.
If you're looking for a bizarre yet cost-effective vacation, consider staying at the Weird Hotel, a resort almost entirely staffed by robots. It sits in the middle of the Huis Ten Bosch amusement park in the southwestern Japanese city. When tourists check in, a Japanese-speaking humanoid and an English-speaking robotic dinosaur greet them. Bell hop bots then carry luggage to their room. A computerized concierge sits in every suite, which can help guests find events and restaurants nearby. Actual humans make the beds and tidy up the rooms — which, other than the robots, look like normal hotel rooms. Cost per night: $80.
Hotel Marquez de Riscal in Elciego, Spain.
Hotel Marquez de Riscal in northern Spain was designed by legendary architect Frank Gehry. Most of its "roof" is a series of twisting metal sheets that reflects the sky, grassy hills, and surrounding vineyards and mountains. Each of its 43 rooms have tilted walls, windows in the shape of zig-zags, high ceilings, and art deco furniture. It looks more like a work of an art than a hotel. Cost per night: Starting at $350.
The Ice Hotel in Jukkasjarvi, Sweden.
The "Live Your Time" room.
More than 4,000 tons of ice mined from the Torne River make up this Swedish hotel. Located in the northern Swedish village Jukkasjarvi, it has 19 hand-crafted suites featuring crazy sculptures. One, inspired by the cult horror film "The Cabinet of Dr. Caligari," has distorted, snowy walls. Another room, titled "Live Your Time," is a trippy ice spiral. Near the lobby, there's an ice bar. Outside, sculptures fill the walkway leading to the hotel. It officially opened last month, but if you're looking to book a room, do it now. It'll melt by March. Cost per night: From $400.