Image courtesy Dreamhub The 620-m-tall Landmark Tower, designed by Renzo Piano Building Workshop, will dominate Seoul's 3.4-million-sq-m multibuilding Yongsan International Business District. Unusual double-helix external bracing will stabilize a 620-meter-tall tower at the center of the 20-building Yongsan International Business District, planned for a 3,000-hectare site next to the Han River in Seoul, South Korea. The conical skyscraper is among the first of the major buildings scheduled to start construction soon, now that conceptual designs for the 3.4-million-square-meter brownfield development have been completed. Teams of local and international architects and engineers announced their concepts for each of Yongsan's planned buildings

London's high-rise architecture has a culinary bent of late. First there was the “Gherkin” by architect Norman Foster; now there is the “Cheese Grater” by Rogers Stirk Harbour and Partners, London. The city's next major high-rise, mothballed for three years during the foundation stage but about to spring to life, got its nickname thanks to its silvery leaning south facade.