Eccentric and surprising house and museum of architect Sir John Soane. Mostly unchanged since his death over 180 years ago, it is full of atmosphere. Also have spotlit, late night openings.  

Slightly biased as this is where I live, but Stoke Newington is great place to spend lazy saturday / sunday afternoons getting sloshed with friends. There are 10 + pubs within walking distance who all are great places for one reason or another. I'll pick out the White Hart for its huge beer garden...

The power station is a ghost like ruin that stands on the banks of the Thames. Its right next to the train tracks rolling out of London to the rest of the south of England. I pass it every time I go back to where I grew up and every time I arrive back in London. It has become symbolic with arriving and departing, a constant in my life. I used to joke and refer to it as my lover - seeing me off and welcoming me home.

It paces a Londoner's life. When the tide is low I like wandering on the "beach" and discovering tunnels that take me to the centre of the Earth.

I love the architecture of the Barbican - it is so important to its historical context, at a time when London was being shaped for modernity after the war - they also aspired to make it a bold art centre. We need bold, always.