It’s a long climb up to the top of St Paul’s Cathedral. There are 528 twisting steps through sometimes narrow passageways following a train of other people. There are signs that warn you there is no way down until you reach the top and not to climb if you’re not sure you will make it. But once you get to the top, all that exercise is worth the view and you’ll want to make the best of it before you start climbing back down again!
Little London Observationist 