Case studies: Urban beach by O + A in Amsterdam Urban beach is a floating swimming platform for the river IJ in Amsterdam. It comprises a platform and an elevated strip which is wrapped around the platform and formed a viewing deck. Twisted art museum by BIG This art gallery is a twisted "inhabitable bridge" across a norwegian river. The bridge aims to improve circulation across the site. "The museum visit itself will be a bridge, not a goal" Bjarke. The bridge twists at the