From minibars to pillow menus to 24-hour butlers, today's hotels have turned every indulgence and convenience into a standard necessity. But this wasn't always the case. Not long ago, those little shampoo bottles that people now love to swipe didn't even exist. Nor did in-room iPads or fingerprint recognition technology. Oh, the humanity! Thankfully, over the last 100 years some innovative hotels have helped pave the way for these modern accommodation marvels. Because of their foresight and progressiveness, these ground-breaking properties forever changed the future of the industry, enabling guests to expect -- and demand -- increasingly more.

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