City Hall is the headquarters of the Greater London Authority and the Mayor of London. It stands on the south bank of the River Thames near Tower Bridge. Designed by Norman Foster, it opened in July 2002.
The building has an unusual bulbous shape, intended to reduce its surface area and thus improve energy efficiency. Its designers reportedly saw the building as a giant sphere hanging over the Thames, but opted for a more conventionally rooted building instead. It has no front or back on conventional terms but derives its shape from a modified sphere.
View a video of London City Hall on Google Maps