Concierge.com's insider take:

Aptly named, this 21st-century crystal palace is all iron pillars, wall upon wall of glass, and remarkable art on loan from the Clos Archaeological Foundation. The art includes ancient Egyptian and Hindu pieces, 19th-century totems from Papua New Guinea, and 18th- and 19th-century Chinese portraits. Strangely, it all blends with the black-leather-and-steel-mesh furniture, transparent Philippe Starck Louis chairs, wood-paneled walls, and bathrooms of Macael marble and chrome (though it may be disconcerting to wake up face-to-face with a life-size bedside Qing Dynasty figure). There's a cool pool on the roof deck, along with La Terraza del Urban bar; other drinking and dining options are the first-floor Glass Bar and Restaurant Europa Decó on the ground floor—all happening options for a night out in the city center on the Paseo del Arte. Fans of Barcelona's Claris may recognize the style; this property is in the same group.