A creepy climb for Halloween thrillseekers is offered by the attraction that gives participants the chance to go on an expedition across the roof of The O2. As with the regular climb, the action begins at 'Base Camp' (decked out eerily for the season), where participants are kitted out in jumpsuits, shoes and safety harnesses before being guided in groups along the walkway. Along the way you can expect tricks, treats and surprises and, at the summit, you'll be given a gothic-style map of the capital that pinpoints some of London's horror hotspots. Tours take place during the day but the after-dark (post 5pm) climbs will be especially atmospheric. The climb is suitable for people aged 10+ and at least 1.2 metres tall. Age 10+.