This popular amusement park on the western fringes of the city boasts not just an indoor pool (Mar-Nov) but also a vast summer outdoor area with multiple pools, water slides, fountains and manmade waterfalls. If you’re feeling bold, the dazzling Dekasla will hurtle you through a tube while you sit in a rubber boat. The next time you see daylight you’ll be spiralling around a giant zebra-coloured funnel, until you emerge safely, if somewhat breathlessly, at the bottom. At night, Adventure Lagoon is nicely lit up, providing some Insta-worthy photo ops.
*Please note that tickets have to purchased online in advance. Tattoos, including fake ones, are prohibited at Tokyo Summerland's indoor and outboor pools.