This was another gem in London! The interior and exterior of the building are beautiful...but if all the walking isn't enough exercise for you, brave the stairs and ascend to the upper levels. The first level will give a decent view of the cathedral down below. However, the second level is outdoors and you'll experience sweeping 360 degree views of London's skyline. This place should not be missed! I didn't make it up to the very top, there were a lot of stairs.