Just when you think you’ve seen everything that can be done with concrete, along comes another surprise. Developed by Netherlands-based designers Frederik Molenschot and Susanne Happle, Solid Poetry is a concrete tile that reveals a pattern when wet. The floral patterns depicted here are the result of a carefully-applied surface treatment that reveals itself only when exposed to water or humid air.

Molenshot and Happle imagine their Solid Poetry tiles to be appropriate for gardens, poolsides, bathrooms, saunas, or any environment that encounters frequent humidity changes. Solid Poetry thus enhances environments with its additional aesthetic state that results from a rapid response to natural or user-driven stimuli.