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The only underwater metro station in the world, although in practice you won't notice it as the sea around the station isn't visible from inside the station. Also includes the longest escalators in Finland. Metro trains run in both directions every 10 minutes or so.
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Two outdoor skating rings, open approximately 2 Jan - 24 Feb, depending on weather.
A popular place in summer with a large playground for children and a pleasant café Kasinonranta (in summer season open M-F 15:00-19:00, Sa Su 10:00-19:00). At the beach and the park around you can picnic, kick a ball, play a beach volleyball, swim, canoe or skatefurf. In winter it is possible to snowkite here or hike, skate or cross country ski on frozen sea around Lauttasaari island and even reach some nearby islands.
Kaapelitehdas or just Kaapeli
The former cable factory in Ruoholahti is nowadays a multi-purpose culture centre. It hosts concerts, fairs, art workshops and odd/original museums like the restaurant museum and photography museum. There is a Restaurant/Café/Bar Hima & Sali in the building. At lunch time you can choose your meal from a daily menu or watch the cook prepare your wok from ingredients you selected. Good place for vegetarians.
New sports mall in Helsinki, includes indoor beach, bowling, ice hockey, wall climbing, gym, Megazone, restaurant and lots more...
Crusellinsilta
A cable-stayed bridge, which connects the districts of Ruoholahti and Jätkäsaari. It is named after the Swedish-Finnish composer and clarinetist Bernhard Henrik Crusell (1775–1838).
Huone ("Room") claims to be the world's first event hotel, providing premises and services for their customers to hold their own events. There are twelve rooms of different sizes, and each can be rented for a day, a morning or an evening. Huone can host various kinds of events such as business meetings, birthday parties or sauna evenings. The customer holds the event; Huone provides the premises and services, including catering, with alcoholic drinks or without.