They don't last long, but they are works of art for a short time in winter. Flavorwire has a roundup of homes, hotels, igloos, castles, and art buildings made from ice and snow. Such structures are found in Romania, Russia, Sweden, China, Canada, and the U.S. Even in New Mexico! Shown here is The Celestial Sphere, a concert hall made of ice in Taos Ski Valley, New Mexico. Link