Vertigo is the bar at the top of Tower 42 in the City. Expect spectacular views across London, a crowd influenced by its surroundings (i.e. bankers), a sparsely decorated interior and staff that are a bit hit and miss. An excellent place to take visitors as you'll probably be spending a good number of minutes pointing out the surrounding sights that you can make out in the distance. If you're looking to catch up with friends, this place is probably not for you, but it's a good place to celebrate life with a glass of bubbly. There are usually some security checks before you can get in.