Not the most exciting place inside, but a lovely rooftop area which not all that many people seem to know about, 2 mins walk from Old St station. If it’s packed then The Red Lion is just up the road.
Need some clean air or just a time-out? Kew Gardens is a short train ride away from the city centre but is provides you with space, greenery and and a small holiday for the lungs. The garden contain tropical glasshouses and interesting architecture, so it is a treat for both body and mind.
The Lambeth Walk is not as billed in the song. Quite a bleak but somehow beautiful mishmash of architectural accident–or–design; a legacy of stray WWII bombs intended for more auspicious near-at-hand targets, such as the Houses of Parliament. I study sculpture here each Monday; a lovely workshop inside. The exterior features one of only a few examples of an outside pulpit, apparently for the minister to take his message direct to the shoppers, in the Walk's heyday.