Purple thistles, California poppies, clover, and dandelions have all taken root in the roughly 10-inch-deep, lightweight humus and grape-husk soil in this 580-square-foot green roof. Designer Peter Liang says that he "wanted to plant a green roof for its thermal mass, but I wanted it to be as natural as possible."

A modern forest dwelling in the village of Muraste in Estonia.

Suzanne and Brooks Kelley at the back of their 1,100-square-foot guest cottage.

The owners toured this home, which surrounds a mature tipu tipu tree, while visiting relatives for the day. The brick is original to the 1947 construction.

Sliding doors by Quantum were made to look like the original panes that couldn't be saved, and they lead to a fire pit outside.

The view!

At the top of the stairwell, a sitting area is outfitted with a vintage Eames lounge, a large Jack Goldstein painting, and a 1970s light fixture found by Marcovitz in Paris.

The kitchen features a concrete island topped with marble. Deja-Vu stools by Naoto Fukasawa surround the island. A print by Guy Gormley, as well as a painting bought during holiday in St. Tropez, hang on the walls.

Sleeping nooks that look like the grooves in a block of cheese.

This single-family residence in Bloomfield, Michigan, known as the Treehaus, embodies the iconic style of midcentury modernism. Thanks to a thoughtful renovation, this rare dwelling has been restored to its original state of refined elegance.

The original Emeco Navy 1006 (pronounced "ten oh six") chair caught the attention of famous modernist architects including Frank Gehry and Norman Foster. Knock-offs can be found worldwide but the authenticity of the Emeco chair is easily verified by finding indentions on the backside of the chair. Today, the company still manufactures the same 77-step design with recycled Coca-Cola bottles. Photo by Armando Bellmas.

Like many of Benepe's projects, planting P.S. 111's playground is more than a quality of life improvement. The grass and other flora help absorb flood water during storms, relieving pressure on the city's drainage systems.

The 111 Navy chairs are exact replicas of the beloved aluminum originals, down to the faux weld points on the backside.

At P.S. 111, the Trust for Public Land transformed an asphalt eyesore into a green sanctuary for New York City schoolchildren.

A passage between the walls for hide and seek.

Take a look at some of the most exciting, sustainable buildings around the world, and you may notice something they have in common: green roofs, or rooftops covered with a thin layer of soil to allow for grasses and other low-lying plants to grow.

New Depths Inspired by a local winery, George Kyprianou wanted a glass top on his subterranean wine cellar. The interior is lit, casting soft light into the living space at night and revealing the 132-year-old stone foundation. The three-quarter-inch glass lid sits flush with the floorboards; it opens with an ingenious device that Kyprianou devised using a 12-volt air compressor and a remote-controlled switch. When you push the button, the glass lifts just enough to be removed by hand.

Light Box Peter created a simple uplight at the top of the wood box by wiring together energy-efficient fluorescent fixtures typically used under cabinets and countertops. “The cheaper magnetic models hum unacceptably loudly, so make sure you get the electronic ballast types,” he warns. He then painted the cavity white to reflect light and covered them with quarter-inch-thick acrylic from TAP Plastics. homedepot.com tapplastics.com

The view of Kapiti Island is fully revealed from the tower.

The plumbing fixtures are from Rubinet.

The top container contains Wardell's office—and a "napping nook" above that.

In the dining area, a one-of-a-kind table with a reclaimed Carrara marble top by NET—themultidisciplinary design firm of architect Alejandro Sticotti, with whom Nicolas works—is surrounded by prototypes of the company’s Board chair. The family dog, China, sits on a floor made of travertine tiles.

One of the final steps is to install the H-Brace and feet, both fabricated on another mold.

Eight to ten trailer truckloads of PET bales—each measuring 80 cubic feet and consisting of 20,000 bottles—arrive for processing every weekday.

The sunken living room is just one of many grade changes inside the structure. “We were adamant that we didn’t want something domestic,” says Andrew. “We wanted something surprising, that was hyper-animated, and that, when you moved through it, changed all the time.” The sofa, designed by the couple and Levenbetts, is upholstered in cotton velvet. The Habibi side tables are by Philipp Mainzer for e15, the fireplace tools by Fort Standard, and the doors by Fleetwood.

The 260-square-foot Hytte module features tall ceilings of up to nearly 12 feet. Multiple windows fill the interior with natural light and frame views of the outdoors.

The architects added a small circular skylight to serve as a vertical focal point in the center of the fifth floor. The quarter-sawn white oak risers produce a beautiful rippled grain highlighted by the abundant natural light.

Stepstone's narrow concrete pavers add a graphic touch to the garden.

When designer Hilton Carter furnished the industrial-style Baltimore apartment and work studio he shares with his wife Fiona, their dog Charlie and two cats Zoe and Isabella, he created a wondrous indoor woodland that offers all the benefits of being outdoors without leaving home.

The colors used in the interior were inspired by the surrounding landscape. The kitchen island is clad in solid timber fluting crafted from durable plantation-grown iroko with with a granite top. “The green-blue-brown color of the granite benchtops very much reminded me of the colors of the water in the nearby harbor of Tutakaka,” says architect Belinda George.

A custom sofa was installed on the far side of the bathroom for even more space to relax.