"This ground-breaking new hotel extends over 31 floors of the gleaming steel-gray Sacyr Vallehermoso Tower." Full review

"Opened in 2009 in a 775-foot-high tower shaped like a rounded triangle, the Eurostars hotel neighbors Sir Norman Foster's Lego-like Torre Caja Madrid and is all about the views."

"It is designed as a powerhouse for corporate types with a need to be in this commercial section of town. Tourists weave their way in, especially on weekends when rates drop." Full review

"The up side of something so massive is that it can support extensive conference facilities, a full-service spa, and a well-equipped health club." Full review