There's just something about big, pivoting glass doors. First, this Belgian house debuted what its architects are calling the largest such glass doors in the world. Now this Mexican dwelling, a dreamy summer home for a couple in their 60s according to Dezeen, is adding to the long list of lovely glass portals. Set at the foot of the country's Tepozteco mountain, the two-story abode—dubbed Casa Meztitla—is the work of Mexico City-based firm EDAA, which created the long, low volcanic stone-and-stucco dwelling with the hope that its materials would age naturally and gracefully. Though the exterior is lovely enough, set against its ancient, mountainous backdrop (a popular tourist spot), the interiors also offer plenty of visual deliciousness. Inside, spaces are naturally sun-lit via not only the pivoting glazing, but also a sequence of lightwells and courtyards throughout the house.