Remember the giant waterslide that graced the usually-serene slopes of Alexandra Palace last summer? Well it's back.
For one day only, anyone over seven years old can grab a dinghy and go whizzing the 100m down the slope —although some might see the £8 ticket price as a bit, ahem, steep.
The slide is part of the Alexandra Palace Summer Festival, now in its second year, with events taking place throughout the Park and inside the Palace.
80's classic film ET is screened at the outdoor cinema, while there's a silent disco in a secret forest. For littl'uns (and those seeking a dose of nostalgia), the fun fair's in town with dodgems and waltzers galore.
Inside Ally Pally, the famous Grand Willis Organ takes centre stage for a concert and Big Fish Little Fish host family raves throughout the day.
Throw in zorbing, archery, three music stages, ice skating, a pram race and it's shaping up to be a pretty exhausting day. Fortunately, the street food and craft beer festival will be open to keep everyone fed and watered throughout.
Alexandra Palace Summer Festival takes place on 23 July. Some events need to be booked in advance — check website for details.