Tokyo Dome City

Tokyo Dome is home to Japan's favourite baseball team, the Yomiuri Giants, and its surrounding 'city' features a wide variety of attractions, including Kōrakuen Amusement Park, known for its old-school roller-coaster, which thunders through Tokyo's core.

Also on the grounds is Spa LaQua, which offers an inner-city onsen experience, where you can bathe in spacious luxury while gazing out over the infinite expanse of concrete and neon. Of particular interest are the colour therapy suites (which supposedly help with rejuvenation) and the trippy aquarium room where you can sit and gaze at alienlike jellyfish pulsing around their blue-tinted world. Just remember – no tattoos allowed (though you could probably get away with covering a small one).

Tokyo Dome City is best on Sundays – stop by to see some cosplay freaks (it's the new favourite hang-out for the costume play gangs), watch a rousing baseball match, swoosh around on the rollercoaster and relax at the onsen.