700 buildings will swing open their doors this weekend as part of the annual Open House London event.


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Some of these buildings, like City Hall and the Royal Festival Hall, are well-known places, many have distinctive architectural merit and most are usually closed to the public, all of which goes to make Open House one of the highlights of the London sightseeing calendar.

Among this year’s notable offerings are a chance to see the ongoing work at the London 2012 Olympic Park, a theme called Future London, which looks at the types of new housing planned for the years ahead and the revamped Brockwell Lido.

As well as the buildings themselves, there are loads of talks, walks and other events. Some of these require pre-booking, but the good news is that it’s all free.

More info, programme of events etc. at the official site here