From the air, the hills of Silver Lake, peppered with bungalows, must look like a leafy game of Snakes and Ladders. Roads insinuate their way up and around the mountain slopes and connecting them all from the lowest to the highest are dozens of vertiginous stone staircases. These are the historic Los Angeles Stairs, hidden and unknown to most of the city's residents and visitors. — bbc.co.uk

Tate Britain has unveiled further details of one of the most significant redevelopments in its history, which includes the reopening of its entrance on Millbank and creation of a new spiral staircase. The £45-million revamp, overseen by architect Caruso St John, follows the gallery’s chronological rehang, announced earlier this year. — blouinartinfo.com

The new regional head office of the United Nations in Copenhagen, designed by 3XN, has just been inaugurated.

Check out the very impressive sculptural staircase in its core which, according to the architects, is designed to reflect the UN’s work to create global dialogue. — bustler.net

It's insane; the sides are made from a zigzagging yet continuous, seam-free piece of glass that looks to exceed 30 feet at its longest point. — core77.com