You've been there, done that, got the t-shirt from an overpriced tourist shop, and now you think you've seen all there is to see in London? Think again. On the 21st & 22nd September, Open House London is granting you the unique opportunity to explore some of the capital's most architecturally interesting buildings that are not normally open to the public. This offering only comes once a year, so you should make the most of it. There will be over seven hundred buildings opening their doors on a first come first serve basis, all of which are free to visit. Saying that, however, Open House are being a little cheeky, because to find out which sites are available you have to order a guide book, which costs £7.99.
There are also a few activities that are only available through ballot, and these include a tour of No. 10 Downing Street and The Gray's Inn, as well as a free ride on The London Eye or a View from the Shard; you might also win tickets to an Open-City debate.
So now there are another seven hundred places to go to before you can say 'been there, done that' - but at least you can still say you bought the t-shirt.