“One day, like the water, the land, beaches, and mountains will belong to all,” prophesized Brazilian modernist architect Oscar Niemeyer, whose words are affixed to the volcano-shaped theater that he designed in Le Havre. That day, as described by the socialist designer, has not come. The stifling of imagined egalitarian worlds, in particular those envisioned by Niemeyer and his contemporary, the landscape architect Roberto Burle Marx, formed the basis of Mai-Thu Perret’s solo exhibition “Les Étangs” (12/15–1/31) at Le Portique Centre Régional d’Art Contemporain du Havre.