Construction goes around the clock in the dense nation state of Singapore. But increasingly, the wealthy island is turning away from the typical trappings of new construction and focusing on developing environmentally conscious architecture. And that is in large part thanks to the firm WOHA. Singaporean architecture firm WOHA recently designed the PARKROYAL on Pickering, a high-end hotel that feature terraces literally dripping foliage. And that isn’t their only sky garden.