It’s still three weeks away, but you’d better book now for some of the more popular-sounding happenings at this year’s London Festival of Architecture. From 20 June to 20 July over 600 events will celebrate the capital’s buildings. Here’s our pick of one-off events. We’ll do a round-up of exhibitions and other longer-lived diversions nearer the time. Check out the full programme here.

28 June Bank of England Open Day
Highly recommended tour for those who’ve always wanted to penetrate the Old Lady of Threadneedle Street.

28/29 June Limehouse canal boat tours
Board the Jenny Wren for a waterborne tour of the Limehouse cut and Old Ford Lock. Plus a sneak peek at the 2012 Olympic site.

5 July Montague Place installation
The UCL side street will be transformed with a 200 metre-long sculpture and bounteous festivities.

6 July London Transport Museum Flickr Scavenger Hunt
Flickr photographers - here’s your chance to compete in a round-town scavenger hunt, with a public vote for best photographer.

12 July Architectural bike tour: Beneath the City Streets
Lost rivers, roads, crypts and vaults from the comfort of your saddle (though, unfortunately, all from above ground). One of many architectural bike tours.

12 July Urban Street Hunt
A bit of fun around the streets of Southwark.

15 July London On Film Pub Quiz
Should be in Notting Hill. Isn’t.

18 July Blueprint Big Breakfast with Jon Snow
The most important meal of the day, served for you at Smith of Smithfields while newsreader Jon Snow reflects on his experiences of London. Many other prominent speakers are lined up for this series of breakfasts.

19 July Cheapside Market
See this street of building sites transformed into its former self, as Cheapside becomes a bustling market.

20 July It’s an Architectural Knockout
Oh no.