A 19th-century ice factory is an unlikely location for a cutting-edge hotel, but that's part of what makes La Purificadora so special. Here in the Mexican colonial city of Puebla, you've got to admire architect Ricardo Legorreta's bold minimalist vision, from the black-and-white floating staircase to the 100-foot rooftop pool. Sinking into a purple lounge chair, you sigh at the accompanying skyline views of Puebla's historic center. La Purificadora may have clean lines, but with 26 rooms and suites it offers all the comforts of a luxury hotel, including a spa and fitness center. And while you may be tempted to stay on the roof sipping Jamaica-flower margaritas, the ground floor has a library, a wine cellar, and a restaurant serving contemporary Mexican cuisine. The closer you look at the hotel, the more you'll notice details such as stone from the original building. This architectural sleuthing will prepare you for a tour of old Puebla, a UNESCO World Heritage Site.