During October you can follow a sculture trail around London’s Mayfair district. The best place to start is Burlington Arcade, then follow the trail into New Bond Street, Cork Street. Maddox Street, One Hanover Street and Grosvenor Square. Two or three of these are permanent installations, such as Allies by Lawrence Holofener. It took me a morning to find them, though there were two I just couldn’t find. For more information about where to find the scupltures, the artists and materials see here
Here they are:
Zechariah’s Vision – Laurent Grasso 
Shaggy Wolfhound – Patrick O’Reilly 
Docker – Atelier van Lieshout 
Cinch – Antony Gormley
Simple Talk – Pablo Reinoso 
Allies – Laurence Holofcener 
Life Going Up, Lift Going down – David Annesley
Manolo Valdes – Reina Mariana 
Handbag Heads – Bruce McLean 
Bear with Bucket – Barry Flanagan 
Time/Life Screen – Henry Moore 
Spectral Stream – Antoni Malinowski
While I was in London I found Brown Hart Gardens totally by accident. How lovely and peaceful they look laid out above a former electrical sub-station. There is a cafe at one end too.
To finish off my morning I found these too (not part of the sculpture trail).
My London+ 