Arriba, Indoor and outdoor water park in Norderstedt, Germany.

Arriba is a water park in the Garstedt district of Norderstedt, Schleswig-Holstein, with 3,000 square metres of water surface and an adjacent sauna village. Its indoor area holds an adventure pool, a sports pool, the Mini Insel for children, a brine pool and a thermal bath, with water between 26 and 33 °C. The outdoor Sommerwiese has a 50-metre sports pool, a non-swimmers' pool and a baby oasis.

Arriba opened in 1994 in the Garstedt district of Norderstedt, built by the municipal utility Stadtwerke Norderstedt. In August 2007 a slide park with five runs was added, including a 38-metre turbo slide and a 124-metre white-water channel. Since 2017 the slide park has been supplemented by Europe's first Fishpipe. In 2018 the Deutsche Gesellschaft für Verbraucherstudien rated it "Herausragend" among Germany's best adventure pools.

The sauna village has six saunas, including a Kaminsauna, Blockhaussauna, Panoramasauna, Vitalsauna and Aromasauna, plus a steam bath, the Gletscherhöhle and an oxygen cabin. Its garden stays open all year with a heated whirlpool, a small pool, loungers and Strandkörbe. Events are organised seasonally in the bath and the sauna village.

Arriba sits in the Garstedt district near the Bundesstraße 432; the bus stop "ARRIBA-Bad" is served by lines 193 and 178. Drivers find 680 car spaces and cyclists 350 bike stands on site. The outdoor Sommerwiese with its 50-metre sports pool opens in the warm months, while the sauna village garden with heated whirlpool stays open all year.

The slide park opened in August 2007 with five rides, including a 38-metre turbo slide, two 10-metre family slides, a 124-metre white-water channel and a 115-metre tyre slide. Since 2017 it has been joined by Europe's first Fishpipe. The sauna village garden, open all year, has a heated whirlpool.