Set against some of the most spectacular and dramatic views, infinity pools offer an unforgettable swimming experience. Adventurous tourists flock to natural infinity pools such as the terrifying or the , but man-made versions are architectural and design wonders in themselves. Whether they're perched heartstoppingly high on a rooftop over a city or draped over a cliff overlooking the ocean, infinity pools are the sparkling, turquoise gems of many hotels and resorts. Here are 11 of the most spectacular.

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1. Alpin Panorama Hotel Hubertus, Italy

The outdoor Skypool, part of the new extension at the wellness resort , is 82 feet long and features a glass "window" bottom, which gives swimmers the unique sensation of swimming over the landscape and through the sky. With the pool's fresh mountain waters maintained at 86 degrees F, it serves as a luxurious respite for skiiers and hikers of the area, who can enjoy the spectacular views of the Dolomites as they bathe. The Hotel Hubertus has five other swimming pools, and is home to the Alpenreych Spa.

2. Marina Bay Sands SkyPark, Singapore

Take a dip in the in Singapore, and you'll feel like you're swimming on the top of the world. The pool, located 57 stories high, stretches almost 500 feet across the rooftop of the five-star hotel (it is only available for guests). It's considered one of the largest outdoor pools in the world, and boasts breathtaking, panoramic views of the city's skyline. Swim to the vanishing "edge" of the pool, and experience the heart-stopping sensation of floating among skyscrapers.

3. Velassaru Maldives Resort, Maldives

Known for its beaches and blue lagoons, the Maldives is on most travelers' bucket lists, but the luxurious takes "paradise" to a whole new level with its spectacular accommodations and unparalleled amenities. Many of its villas feature private plunge pools and its infinity pool offer spectacular panoramic views of the beach and ocean.

4. Viceroy Bali, Indonesia

Guests at the in Ubud, Indonesia have access to private infinity pools set against a backdrop of lush tropical jungle. A bigger infinity edge pool is located in the common area, complete with a fountain feature and a swim-up bar overlooking the PetanuRiver Valley.

5. Jade Mountain Resort, St. Lucia

At some hotels and resorts, infinity pools are a bonus feature. At , they are the primary elements of the hotel. Ranging from 400 to 900 square feet in size, each pool features shallow water lounging areas and larger swimming areas, designed with fiber optics so they illuminate at night. The pools' vanishing edges merge the water with sea and sky and highlight the resort's scenic surroundings. And the tranquil nature extends beyond the pools. Jade Mountain is "tech-free,"there are no telephones, radios or television sets (Internet access is available at the reception and upon request).

6 Post Ranch Inn, Big Sur, Calif.

is known as a getaway where guests can sleep in harmony with nature but still also enjoy impeccable service and accommodations. Their are rustic and luxurious and provide beautiful mountain and ocean views, so it's not surprising that the resort's two heated infinity pools are just as enticing. The basking pools are kept at a constant 104 degrees to provide rejuvenation and relaxation against the breathtaking, panoramic Big Sur backdrop. You'll appreciate the luxury after hiking the trails and enjoying the free yoga on the site.

7. Hilton Pattaya, Thailand

Located in a bustling beach resort in Thailand, theis surrounded by stunning beaches, and shopping and entertainment complexes but many of its guests would probably just prefer to stay in and relax at the hotel's outdoor infinity pool. Set amidst landscaped gardens with sun decks and relaxation areas providing unobstructed panoramic ocean views, the pool is the perfect spot to unwind and enjoy the tropical weather—and cocktails from the hotel's Shore Bar.

8 The Cambrian Hotel, Switzerland

Many infinity pools are set against a backdrop of tropical islands or azure ocean waters, but at the, guests of the wellness retreat get a panoramic view of snow-capped mountains of the Swiss Alps. Known for its spa treatments, the hotel's heated outdoor pool is the ultimate relaxation spot. And who wouldn't feel relaxed and rejuvenated after a few hours floating in a sunlit pool with views of the mountains for miles?

9. HaciendaNa Xamena, Ibiza

The has perhaps one of world's most unique infinity pool system. Called the "Cascadas Suspendidas," the pools are located on top of the cliffs of the Na Xamena, almost 600 feet above sea level, with stunning views of the Mediterranean. The pools were built with different depths and are located on different levels, interconnected by relaxing waterfalls, according to the hotel's website. Each one is equipped with air jets which provide a 45-minute head-to-toe massage.

10. Blue Palace Resort and Spa, Greece

Nestled in the coast of Elounda in Crete, in one of the most serene private beaches on the island, the is a luxehideaway. Many of the bungalows, suites and villas feature private infinity pools, with water heated to a constant temperature of 79 to 82 degrees during the spring and autumn months, and draped over the edge to blend seamlessly into the sea.

11. Sofitel So Bangkok, Thailand

The luxury lap infinity pool at the extends almost 100 feet across the 10th floor, its water seemingly flowing over the edge to give the sensation of swimming in mid-air. According to its website, music is piped into the pool and at night, underwater LED lights illuminate the water in vibrant colors. Nearby, the "Solarium" provides guests with a spot for tanning during the day or a star-lit venue for evening events.

12. Hilton SeychellesNortholme Resort and Spa, Seychelles

Almost hidden in the hills and coves of Beau Vallon Bay on Mahé in the Seychelles, is reportedly a favorite haunt of James Bond creator Ian Fleming (you can even book the "Ian Fleming Suite" which inspired ). It's uncertain, however, if he had soaked in the hotel's free-form infinity pool overlooking the ocean, complete with sun loungers and parasols. The pool also offers a dramatic view of the sparking-blue Indian Ocean. It's the perfect treat for a vacationers looking for some peace and quiet (the hotel welcomes guests 13 years and older).