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St Paul's is London's baroque heartbeat: Wren's great dome rising over a city rebuilt after fire and war. Inside, sunlight grazes mosaics and soaring arches; below, the crypt holds Nelson and Wellington. Climb if you can: the Whispering Gallery's curved acoustics, the Stone Gallery's open terrace, and the narrow Golden Gallery crown the climb with sweeping views. Worship continues daily, but most visits are self-guided with an excellent audio tour included. Accessibility is strong on the floor and crypt, though upper galleries are stair-only. Arrive early, dress for the climb, and pause before stepping into the highest balcony. When you descend, sit a minute in the Quire to read the Victorian mosaics in quiet sequence.
