The media pavilion for the 2002 Swiss National Expo was a cloud. Organizers built a curved building fitted with more than 30,000 nozzles that pumped water from Lake Neuchâtel into a fine mist, creating a floating 90-meter fog bank whose contours were controlled by a computerized weather system.

Artist Antony Gormley took this idea a step further in 2007 with Blind Light, a 10-meter-square glass vitrine filled with mist and lit by 7,000 lux of intense fluorescent light that reduced visibility to less than an arm’s length.

“One could, and did, get temporarily lost in its 90 percent humidity,” writes Richard Hamblyn in Clouds: Nature and Culture (2017). “The intended effect of Gormley’s ‘bright, cuboid cloud’ was to overwhelm the senses, as though one had walked into a cloud, literally and figuratively, entering a cold, damp, unsettling world of enveloping isolation.”