If you live in a northern climate, chances are you’re craving sunshine right about now. But what if you had an indoor pool, so you could at least pretend it was summer? That would help. Interestingly, many of these 12 pools are in warmer spots, but play with the idea of blending indoor and outdoor space.

Above: Eduarda Correa Arquitetura

Paulo Marto and Paul Acland of London-based Paul+O Architects designed this pool area which looks to be partially in and partially outdoors. The minimalist design, in white and gray concrete, is a stark juxtaposition to the landscape.

This lap pool cum hot tub was designed by GRAS Arquitectos, a firm based in Palma de Mallorca. The wood ceiling is echoed in the decking, but the walls are white and glass, keeping the overall feel light and airy.

Ambramson Teiger Architects of Culver City, California, designed this contemporary home with a double height indoor pool area that opens onto an outdoor patio. Look to the left—a glass wall peeks into a room on the other side.

Chicago-based firm Northworks Architects + Planners converted an existing 19th century barn into a beautiful home clad in vertical wood and topped with a standing seam metal roof. Of course, every barn needs an indoor lap pool, especially if it’s located in Michigan.

Vanguarda Architects designed this extensive pool house in Buenos Aires. The pool seems to extend right through the building’s large plate windows, where it then drops off to a lagoon. A double height sitting room functions as the indoor patio.

Russian architect Nicholas Lyzlov designed this indoor pool covered in variegated green mosaic tile, which contrasts beautifully with the wood slat ceiling above. At one end, a wall looks to be embellished with protruding concrete blocks.

Cadas Arquitetura, based in Rio de Janeiro, designed this stunning wood decked, mosaic tiled pool. Narrow double doors lead out to a wooded yard. Definitely a tropical delight.

While the kitchen of this home, located in a suburb of Buenos Aires, is indoors, the pool is technically (mostly) outdoors, though covered by an overhang. Designed by Estudio Botteri-Connell, the rambling home, called Bunker House, is comprised of long horizontals, topped in the middle by a concrete-like second story.

Chicago area firm New Space Architects designed this sleek white contemporary residence, with a pool that slices through it. Though it looks to be outdoors, if you look up, you’ll see it’s covered by a glass skylight. Two glass catwalks cross over the pool, and plenty of glass railings keep the space crystal clear.

Palais Rasumofsky was built for the former Russian ambassador under Czar Alexander during the time of the Viennese Congress of 1806. Recently, architecture firm Baar Baarenfels undertook the renovation, hired by contemporary art collectors who commissioned its conversion into an art foundation and private residence. The concrete wall lends a modern feel to the simple indoor pool.

Located in Bangladesh, this three story residence is constructed of cast-concrete, with vernacular wood-frame windows. Architecture firm Shatotto, devised a water-courtyard for the swimming pond in the middle of the house to ensure privacy.

For more indoor swim spaces, see Montage: 24 Modern Indoor Pools on StyleCarrot.