Light, technology, mappings, urban dances, Parisian artists... These are just some of what's on in the Parc de la Ciutadella at night during the city's Festa Major. Head over to see how the park is transformed when the sun goes down. You might find the team from Groupe Laps (Paris), who work in fine arts, theatre arts and lighting, mixing their media and techniques to create works like 'Keyframes' – which you'll see in the Ciutadella park – made to be seen in public spaces and at night. You'll also come across the acrobats from Le Monfort Théâtre with their impossible feats on a big cloud, and the latest interactive installation from Barcelona's own OnionLab, among other attractions.