On a hot day there is nothing better to do in London then go for a swim in the Heath ponds. You get completely transported you out of the city as Hampstead feels like being in the countryside except you're in central London?!
The Barbican Estate is a residential estate that was built during the 1960s and the 1980s. An icon of Brutalist Architecture the Barbican Estate is an unique and complex real life experiment; a city within a city. The main focal point of the estate is the lake and its neighbouring terrace. High above and behind the terrace is the Barbican Centre, the largest performing arts centre in Europe. I really rate their visual culture exhibitions (for instance, Jean-Michel Basquiat and the Bauhaus) and live concerts (Nils Frahm and Ryoji Ikeda). Love it!