Love it or loathe it, Turner Prize–winner Anish Kapoor's 115m-high, twisted-steel sculpture towers strikingly over the southern end of Queen Elizabeth Olympic Park. In essence it's an artwork, but at the 80m mark it also offers an impressive panorama from a mirrored viewing platform, which is accessed by a lift from the base of the sculpture (the tallest in the UK). A dramatic tunnel slide running down the tower is the world's highest and longest, coiling 178m down to ground level.
Descend 4m (via a caged external staircase) from the platform for more vistas, interpretative screens and an outside section. From here, you can opt to skip down 455 steps to the ground (accompanied by soundscapes of London) or hop back in the lift. Alternatively, weave your way down on the superb tunnel slide (worth the extra £5, children must be over eight years old), which takes 40 seconds to get you back down. For further thrills, take a free-fall abseil off the tower (£85, book ahead, kids must be over 14).