Founded more than a thousand years before Tokyo even got its name, Senso-ji pulses with a lively, incense-thick energy that feels like a portal to old Edo. You'll approach through the iconic Kaminari-mon gate with its enormous red lantern, then navigate a gauntlet of traditional shops along Nakamise-dori selling crackers, fans, and trinkets. The five-storey pagoda glows beautifully at dusk, and the temple grounds take on a mysterious, lantern-lit atmosphere after the crowds thin out. This is Tokyo's beating spiritual heart, equal parts pilgrimage and carnival.