A cast of timeworn houseboats has long lined Paris’s snaking Seine river. But this week some new temporary residents have settled in: a kooky crew of campers and caravans. For D’Days, a design festival taking place June 1 through 7, a group called Les Berges has tapped young designers to create modular housing prototypes that throw into question many terms of city living, proposing some alternative (albeit a tad impractical) ways to inhabit urban spaces.

The Markies, created by Bohtlingk Architectuur, starts as a compact box and folds out to triple its footprint to include a living room, bedroom, kitchen, and bathroom. Its furnishings, of course, also fold down into more compact forms. The Urban Free habitat, by N55, offers a geodesic sphere in which to sleep. It becomes rainproof when covered with a tarp and also turns out to be quite portable: You can simply roll it from site to site. As in any true campsite, a collection of furniture—hammocks by Collectif Encore Heureux and a picnic table by Cédric Carles and Marie Boussard—is stationed around the mobile homes. So for parisiens looking to change up their picnicking spot, there are a few new options—but not for long!

For more information visit lesberges.parir.