Do the Edinburgh one – if for no reason other than getting to cycle down the god-knows-how-many steps from the Royal Mile to Waverley Station!!
Also great fun running amoc around such a beautiful city. Fully recomended. The running is not my thing, but it's manageable – might mean you're a tad achey for the bike riding the next day, but it's all good fun.
Highlights for me – abseiling down a glass building opposite the new parliament and a free abseil off the roof of Murrayfield Stadium! oh yeah – and doing an impression of Sean Connery's Bond in a swanky flat, beermat flipping at a nice pub in Bruntsfield, spacehopper race with fecked legs, and caning about 6 cans of free red bull whilst waiting for our go at one of the challenges.
Do it!