Sky Stack is an art installation that consists of five reflective rings wrapped around an old chimney rising above Clasen Business Park in Kassel, Germany. Designed by Hamburg-based architecture studio asdfg, the shiny stripes mirror the changing colors of the surrounding sky to create a magical illusion of a partitioned chimney tower floating in the air.

Oscar Niemeyer, the prolific Brazilian architect who changed the landscape of metropolises with his unique vision of international and modernist styles, passed away last night at the age of 104, according to local news reports. Throughout his career spanning over nearly eight decades, Niemeyer established himself as one of the most renowned visionaries in the field, particularly for his role as the mastermind of the architectural landscape during the construction of Brasilia in the early 1960s.

Luminair's Tree Tent is an outdoor living capsule made of of high density cotton canvas and wood / aluminum hybrid wire frame that can be suspended from a tree. Spanning three meters in diameter, this 100 percent waterproof tent can comfortably accomodate two adults and comes equipped with an under-floor water tank. Additional kits like extendable side benches and a bio-fuel stove are also available.

Peruri 88 is a proposal for a 400-meter tall skyscraper complex to be built in the southeast area of Indonesia's booming capital Jakarta. Designed by the Dutch studio MVRDV in partnership with American firms Jerde and Arup, the building would consist of four staggered towers topped with jungle-like rooftop gardens and even a lopsided outdoor IMAX theater (shown, bottom left). If the developer's submission wins the bid, the construction will start imminently, according to Designboom's report.

In the heart of Shanghai's hustle-and-bustly Lujiazui financial district lies a circular elevated walkway that serves as a pedestrian overpass and an observational deck. For more bird's eye views of the landmark, head over to Google Maps.

Photographed by Victor Lakics from the Oriental Pearl Tower.

The Root Bridges of Cherrapunji refer to bridges that are woven from the roots of living rubber trees in the Cherrapunji rainforests of Meghalaya, India. Some of them are more than a hundred feet long, grow over decades and withstand the weight of fifty people. Not only are they environmentally friendly, the bridges are also quite utilitarian since the roots grow stronger over their lifespan. For more info, check out this BBC video.

Back in the '70s, NASA Ames Research Center commissioned a couple of space colony studies which resulted in these retro-futuristic artistic renderings of space habitats that can house about 10,000 people. Click through for more examples!