Dutch architecture firm UNStudio has designed a skyscraper for Singapore that looks like a cactus. More »

Algae would produce energy and clean water for a conceptual skyscraper proposed for London by British architect Dave Edwards. More »

This conceptual skyscraper by Brazilian architects Projeto Coletivo would be constructed using rubbish in the city of São Paulo. More »

Dezeen Wire: a skyscraper by fashion designer Pierre Cardin is set to be constructed in Venice, which at 245 metres high will be more than twice the height of the bell tower of St. Mark's Basilica. More »

The stark concrete exterior of many of London's postwar housing blocks could be made more attractive with thatching, proposes architecture student James Kirk (+ movie). More »

Here are some photographs of the 442-metre Kingkey 100 skyscraper designed by architects Farrells, currently the tallest building in Shenzhen and tenth tallest in the world. More »

Israeli architect Moshe Safdie has designed a skyscraper for Sri Lanka comprising one tower slumped against another. More »

London-based architects Serie and Singapore architects Multiply have designed an extension to a law court in Singapore with terracotta-clad courtrooms stacked up inside a giant cage. More »

Next up in our coverage of London 2012 Olympic design is a 135-metre skyscraper by architects SOM full of apartments overlooking the Olympic park. More »

Skyscrapers in Seoul: New Yorkers Asymptote Architecture are the latest firm to reveal designs for the Yongsan International Business District of Seoul and have proposed two skyscrapers connected by a bridge 125 metres up. More »

Skyscrapers in Seoul: here's yet another skyscraper proposal for the architectural zoo that is the Yongsan International Business District of Seoul - this time a 385-metre-high tower by architects Kohn Pedersen Fox with a vertiginous swimming pool sticking out two thirds of the way up. More »

Skyscrapers in Seoul: Renzo Piano Building Workshop have sent us the first image of a 620-metre-tall tower they are designing for Seoul, South Korea. More »

Dezeen Wire: plans have been unveiled for a 425-metre-high skyscraper designed by architect Rafael Viñoly for New York’s Park Avenue, which will become the tallest residential tower in the USA if built - The Wall Street Journal

While buildngs over 300 metres are currently classed as "super-tall", the Council on Tall Buildings and Urban Habitat in Chicago published a report at the end of last year announcing "the era of the mega-tall tower" and predicting the 20 tallest buildings in the world by the year 2020 - more details in our earlier Dezeen Wire story.

See more stories about Rafael Viñoly here, including the interview we filmed with the architect about the golden arts centre he completed in September last year.

See all our stories about skyscrapers »

Skyscrapers in Seoul: Chicago architects Murphy/Jahn have designed two towers under one roof for the western side of South Korea's new commercial centre, the Yongsan International Business District of Seoul. More »