Central roof forms; Since the late 1980s Gehry has experiemented with the sensuous possibilities of metallic surfaces. The deconstructed masses of Gehry's designs are best expressed in the exploded organic shape of the Guggenheim Museum Bilbao (Bilbao, Spain 1997). Gehry situated the museum within the living and working space of the city, allowing the Puente de La Salve (one of the main thoroughfares of the city) to pierce one side of the museum. The Calle Parraguirre, another main street bisecting the city, leads directly to the main entrance of the museum. Visitors both climb and descend stairs as they enter the museum, an unusual feature in an institutional building, and are led through rotating exhibition spaces to the atrium which is l...