Pôle Scientifique et Technique Paris-Est, a research and civil-engineering center also known as Espace Bienvenüe, in Marne-la-Vallée, a city east of Paris. The focal point of the site is a more than 650-foot-long undulating concrete building, which is covered with an accessible garden terrace designed in collaboration with landscape architect David Besson-Girard.

Moesgaard Museum, Højbjerg, Denmark

The Moesgaard Museum, an institution dedicated to Danish archaeology and ethnography, moved into a striking new building designed by architect Henning Larsen in 2013. Covered in grass, moss, and flowers, the structure’s sloping roof is open to visitors, offering ample space to relax, picnic, or enjoy the views of the woodlands and Moesgaard Manor, the former home of the museum.

Meera Sky Garden House, Singapore

Greenery is visible or accessible from every floor of Meera SkyGarden House, a four-story private residence built by architect Guz Wilkinson on Sentosa, an island in Singapore. The building is constructed with roof gardens on each level and combines glass and solid walls to provide privacy while maximizing cross ventilation, thereby reducing the need for air-conditioning.

Städel Museum, Frankfurt, Germany

The Städel Museum, which was founded in 1815 and showcases an exceptional collection of European art, was given a subterranean expansion in 2012 by architecture firm Schneider+Schumacher. The new space below the garden is home to the 20th-century art collection, and is topped with a domed, airy ceiling punctuated with circular roof lights, which forms the base for the striking topography of the grassy garden above.

Olympic Sculpture Park, Seattle

On the banks of Elliott Bay, architecture firm Weiss/Manfredi transformed a former