The Greenwich Observatory with its green laser beam can transfigure any night sky. If you decide to cross the Thames via the foot tunnel, make sure you look out for the green ray. You can be on one side of the meridian in a minute, and cross to the other side on the next, without even realising it.

My walk through the Heath often continues on to the Camden Arts Centre, a really fantastic exhibition space that runs workshops and courses as well as having a great café and bookshop to boot. I collect their exhibition booklets called File Notes - beautifully designed by James Goggin and Sarah De Bondt - some memorable shows include Eva Hesse Studiowork, The Bruce Lacey Experience and Serena Korda’s Aping the Beast. The latter concluded with a procession from the gallery up to the Heath, culminating in a re-enactment of The Battle of the River Plate in a pond. This is my photo of the Beast and the Boob Meteorite.

A charming garden centre with cafe and restaurant, both located in beautiful greenhouses. Well worth a visit at any time of the year. 

This is one of the only buildings in London that can lift depression. Each concrete block in the building is hand cast and hand hammered. Certainly the best bannisters in town.

I can't pass without dropping in, Orcs Nest is a small independent boardgame, D&D etc store that's been around forever(1987)... and has the best logo. Good selection of games for younger kids too.