You wait a lifetime for a novelty version of a neolithic monument to come along, then two appear at once. Hot on the heels of the Stonehenge made from cars this inflatable, bouncy henge arrives in the capital this weekend. It's open to all ages, and at no cost — other than to your dignity.
The installation, known as Sacrilege, is by Turner-Prize-winner Jeremy Deller. It's been wobbling its way around the country for the past few weeks, but reaches London on 21-22 July, when you'll find it in Central Park, Greenwich Peninsula. Thence it will move around the capital, visiting 14 different parks (including several in the outer boroughs) throughout July and August. The inflatable's itinerary can be viewed here.