Detail We Love: Porthole Windows

Nautical influences run deep in modern design, from the blue-and-white color palette to spatial organization. One maritime element that's cropped up on occasion is the porthole—a creative alternative to boxy windows that seem square in comparison. We're on board with this architectural detail. Slideshow

To increase airflow in a San Francisco house, architect Craig Steely designed operable portholes in the all-glass facade. Photo by: Ian Allen