Swap solid ground for city heights with a spot of urban mountaineering. Up at The O2 is a chance to scale the iconic O2 Arena and look out over Greenwich and beyond from a unique perspective. Get kitted out in a comfy climb suit, boots and harness, and watch a video as part of the safety briefing. Then begin the ascent, using the special walkway to climb ever higher, and ensuring safety by attaching the harness to the support rail. The friendly climb guides are there for support every step of the way. Reach the top of The O2 and survey the surroundings from a platform suspended 52 metres above ground level. Depending on the time slot chosen, witness the landscape in bright daylight, romantic sunset or glittering twilight). Don't forget a camera