The Biggest, Tallest and Grandest Hotels in the World, the online accommodation booking website with more than 150,000 properties around the world, has created a list of some of the biggest, tallest and grandest hotels, giving travelers the opportunity to book one of kind accommodations this summer.

To hotels like the First World Hotel, and San Francisco's Hyatt Regency, size truly does matter.

The colorful First World Hotel, Genting Highlands in Malaysia was crowned the largest hotel in the world by the Guinness Book of World Records for its over 6,000 guestrooms. The First World Hotel's two towers overlook a 500,000 square foot entertainment plaza with 11 restaurants, indoor and outdoor amusement parks, a rainforest and unlimited shopping.

The Grand Hills Hotel and Spa in Broumana, Lebanon is home to the 44,500 square foot Royal Residence Suite. Three floors of the suite are devoted to salons, living and dining rooms while the other three floors contain luxuriously large bedrooms. The biggest suite in the world also contains a wine cellar, private garden and several private pools.

The biggest lobby belongs to the Hyatt Regency of San Francisco. The 15-story-high, 9,547,200 cubic foot atrium is a massive work of contemporary art. At the center of the 351-foot-long space is Charles O. Perry's Eclipse, a 40-foot-high geodesic sphere rising from a reflecting pool into the 170-foot-high space above.

Algarrobo, Chile's San Alfonso del Mar houses the world's largest swimming pool. The 66 million gallons of seawater consume 20 acres of land. The $1.6 billion pool is not just for swimming though - sail boating is a popular water activity on the 3,323 feet of constantly circulated water.

The Shun Jing Hot Spring Hotel in Beijing, China is home to the Guinness World Record holder of largest Spa Resort. At 1,052,676 square feet, the spa took nearly 10 years to build. Tucked inside are more than 90 different Japanese-style baths, napping rooms, and a movie theater.

Bigger is not always better, of course. Travelers looking for a view need look no further than Namche, Nepal's Hotel Everest View (HEV). At 13,000 feet above sea level, every guest room has a panoramic view of Mount Everest and a 24-hour flow of fresh oxygen to help prevent altitude shock.

Guests looking for more royal accommodations can check out the Royal Penthouse Suite at the President Wilson Hotel, in Geneva, Switzerland. At $65,000 per night the suite boasts views of both Lake Geneva and Mont Blanc.'s Welcome Rewards loyalty program allows guests to earn a free night for every 10 nights stayed at more than 65,000 hotels.  Under the website's Price Match Guarantee, if a customer finds the same deal for less on a prepaid hotel, will refund the difference.

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