Architect Matyas Gutai has built the world's first water house in his hometown of Kecskemet, Hungary.
A sheet of water is trapped between the inner layers of the house, which equalizes the temperature across the building.
The indoor temperature can also be modified using a monitoring system similar to central heating.
Gutai built a prototype house in his hometown of Kecskemet, south of Budapest, with his high school friend Milan Berenyi, after years of research and development.
The prototype house is too small to live in, but showcases the "liquid engineering" concepts Gutai has written about extensively.