That's right, the venue formerly known as the Millennium Dome has opened a walkway across its roof that takes you up one side of the UK's second largest arena, over the top, and down the other side. It's that simple.
Described on the O2's website as "an exhilarating active outdoor challenge [giving] a completely unique perspective on the capital," the Up at the O2 experience is one so outlandish that when you tell your friends, "I walked over the top of the O2 arena," they will more than likely come back with the straight-faced reply: "What did you do that for?"
Open from 10am to 8pm June to September, and from 10am to 5pm October to May, it might be one of the most expensive walks you undertake in the British capital.
At £22 a pop, the 90-minute experience certainly doesn't come cheap, though organisers of the attraction are describing it as "unforgettable", "spectacular" and "thrilling" in an effort to allay any fears among visitors that it may be a tad overpriced.
Up at the O2 promises 360-degree views of London from the viewing platform located on top of the structure, so be sure to have your camera with you when you go.
The outdoor experience will operate in all weather conditions, except, one assumes, when forked lightning is crashing around the place. Also, only those ten years and over will be able to take part.