London Attractions : London Sightseeing
Two galleries of modern and contemporary art sited on either side of the Serpentine in Kensington Gardens.
Admission is free but do check that an exhibition is on before you visit as they are not always open.
UG: Lancaster Gate 0.79km
UG: Queensway 1.04km
UG: Knightsbridge 1.08km
Check their website for dates and times of events.