Daredevil dancers have sky-walked, bungee-jumped, and tumbled across some of the British capital's best-known landmarks ahead of the Olympic Games.
The performance - called "Surprises: Streb" - saw red-suited acrobats bounce up and down like yo-yos from London's futuristic Millennium Bridge, while others walked across the roof of London's glass-domed city hall.
At the 17th-century stone column known as The Monument, performers spun around in what appeared to be a giant hamster wheel.
And at Trafalgar Square, a group of dancers wowed tourists with delicate maneuvers on a gently rotating ladder.
Sunday's eye-catching series of events is part of London's Cultural Olympiad, a celebration of film, music, theater and other art which is coinciding with the games due to begin July 27.