Secret History, or even England Uncovered, might be a better title for this eclectic weekend of films, talks, installations and performances celebrating the English landscape and folk culture. But fear not: it's not all mist, drizzle and warm bitter.

There's The Witchfinder General, the "Suffolk western" directed by Michael Reeves in 1968; Alan Clarke's mystical musing Penda's Fen, written by David Rudkin; and Andrew Kötting's more recent tour round the isles, Gallivant.

Meanwhile, Adam Chodzko's installation A Plan for a Spell promises to randomly combine images of tar barrelling, demolition derbies and pyres of slaughtered cattle in search of "the right combination of sequences that will catalyse the release of a spell". Weird, and very possibly wonderful.

· Today to Sunday at Cecil Sharp House, 2, Regent's Park Road, London NW1. Tel 020-7503 3980. www.lux.org.uk/visionary.html