Puerto Cancun is the point where the hotel zone converges with the center of the city of Cancun. This private residence is surrounded by natural bodies of water within a 327-hectare residential development that includes a beach, marina, golf course and other amenities. The guiding concept of the project was introducing the exterior into the interior by creating open and transitional spaces between public and private areas. This gave rise to the proposal for four regular, independent walls linked by an open lobby. This hub serves as a principal lobby housing internal gardens and a pool of water which visually extends towards the external swimming pool, and is completed by the sea. The volumes are laid out in irregular fashion across the site, optimizing views, solar gain, and ventilation, while achieving an outstanding interior perspective where users gradually discover the spaces and hidden corners through double-height spaces, semi-open areas, different materials and interior gardens with a view of the Caribbean sea. Each volume maintains its own identity, while they remain integrated with the same architectural language. Two of the four sides faces of the volume are imposing concrete walls that function as the sole support for each body, leaving fully open-plan floors as a result. These concrete walls include narrow slits that frame external views and allow in the exuberant vegetation of the region. The structure of each volume is accompanied by a mobile screen that opens onto the best views, while closing off the adjacent plots to improve privacy. The architectural program is distributed over the three floors of the house, with the service areas in the basement, the public areas on the ground floor, and the private zones on the upper floor.