This twelfth-century church was left untouched after being heavily damaged by Blitz bombs, presumably because everyone was quite busy after World War II. Decades later, nature has taken over, and what remains is a blissfully peaceful and wonderfully verdant public garden – about as chilled out as it gets in Zone 1. Look out for the still-intact tower, which was added to the church by Sir Christopher Wren in 1700.
Nearest Santander Cycles docking station: Monument Street