Tokyo Metropolitan Government Building Observatories

Kenzo Tange's domineering Tokyo Metropolitan Government Building is worth visiting purely to have a good look at its spectacular edifice, but it's also home to a pair of free observation decks that have become a popular stop on many tourist itineraries. For good reason, too: unlike other contenders like Roppongi Hills (¥1,500) and Tokyo Sky Tree (¥2,000 and counting), the TMG's observatories are completely free of charge. Particularly popular at sunset, when clear days afford good views of Mt Fuji, the observation decks also serve refreshments.