The Digital Press

Aquapolis was a floating city prototype designed by Japan's Kiyonori Kikutake, showcased in 1975 to envision future life on the sea as a human habitat.

Why it matters: It presented a pioneering vision of sustainable, mobile living spaces on the ocean, pushing boundaries of urban design.

The big picture: Aquapolis embodied 1970s utopian hopes for human-sea interaction and resource use, reflecting broader maritime futurism trends.

The other side: Critics questioned practicality, debating whether maritime steel cities address real land and environmental challenges effectively.

Commenters say: Users find the concept inspiring yet impractical, sparking discussions on mobility, ocean engagement, and comparisons to places like Sealand.