Guildford is the county town of Surrey, England, as well as the seat for the borough of Guildford and the administrative headquarters of the South East England region. Surrey County Council, however, has its administrative base in Kingston upon Thames which, although formerly in Surrey, is now in Greater London. The town is twinned with Freiburg in southern Germany, and linked with Mukono in central Uganda. There is a small museum in the town centre and the University of Surrey is situated to the north-west of the town centre, about ten minutes' walk from Guildford main line train station. Guildford has the most visited Art Gallery in Surrey - Guildford House Gallery with over 120,000 visitors per annum. The Gallery is situated in the High Street, in a 17th Century Grade I Listed Town House and is run by Guildford Borough. It is open Tuesdays to Saturdays and admission is free. Its own art collection includes works of Guildford and the surrounding area, and work by Guildford Artists, most notably John Russell R.A. Stoke Park is the venue for both the Guilfest music festival during the summer and the Surrey County Show (agricultural and general) on the last bank holiday Monday in May. Previous to 2007, the Ambient Picnic was held in Shalford Park, by the River Wey.