Think big, play big, win big — this could easily be the philosophy behind the MGM Grand. Even though Vegas is known for its monster-sized accommodations and casinos, this hotel still manages to stand out. The 30-floor main building alone has 5,044 guest rooms and suites, and the Grand Pool Complex features five swimming pools, a meandering "lazy river" and waterfalls. The property also houses a convention center, the 16,800-seat MGM Grand Garden Arena and an interactive CSI crime-solving experience. But none of this compares to the casino, weighing in at 171,000 square feet. Divided into four separate gaming areas, it boasts every possible way to place a bet and, hopefully, win big.