As the city's green spaces spring into life, explore some of the more unusual ones on these guided tours with City Garden Walks. Some, such as the tour of Bunhill Fields (Wednesdays at 12.30pm), are perfect for weekday lunch breaks, others, including the City Gardens Central (Saturdays at 1.30pm) and City Gardens East (Sundays at 1.30pm) ones are perfect ways to experience the City outside working hours. All of them offer a different side to the modern metropolis, such as one of its most romantic gardens (in the ruin of the Wren church of St Dunstan in the East) and atmospheric burial grounds (at Bunhill Fields). See the City Garden Walks website for details and meeting points. No booking required.