Wild and undulating, the 320-hectare grassy sprawl of Hampstead Heath makes a wonderfully untamed contrast to the manicured parks elsewhere in the capital. A playground for picnickers, dog-walkers, and nature-lovers alike, keep an eye out for some very special residents such as muntjac deer and parakeets.
Insider tip: Take a dip in the heath’s swimming ponds. The men’s and ladies’ ponds are open all year round, but be warned that even in the summer the water is pretty frosty.