Tokyo’s Inner Central District overtook London’s West End to become the most expensive office location in the World - with an occupancy cost of $183 per sq. ft. - according to the CB Richard Ellis global office cost survey.

Moscow, Hong Kong’s central business district and Tokyo’s outer central district were in third, fourth and fifth position.

Financial centres around the world have been hit by declining occupier demand. In many cases office occupancy costs have dropped by 20% or more over the last 12 months.

Selgas Cano is a Spanish architecture firm, and this long glass tube in a little wooded ravine is the Madrid office they’ve built for themselves.

The shutters over the clear roof are retractable and allow for natural light to pour into the space.

Ceilings are both low and high, depending on the retraction of the roof and on which part of the room you’re in.