If you’re religious, you should go check out St. Paul’s Cathedral. If you’re not religious, you should still go check out St. Paul’s Cathedral. Unfortunately, you can’t take pictures inside. But the good news is you can take as many as you want, outside. I went on a Sunday, so exploring the rest of the church was off limits. This meant we couldn’t climb the dome or experience the Whispering Gallery, where you can whisper into one point of the wall, and the listener can hear you from any other part of the wall within the gallery. Would have been pretty awesome, so just be sure to check opening times for when you visit.