Slide & Splash, Aquashow and Aqualand were not the authors of the song “Barbie Girl”. They’re some of the largest waterparks in Europe, and all found in the sunny Algarve, Portugal. With over 300 days of sunshine a year in the Algarve, you might find that Slide and Splash, Aquashow and Aqualand provide a (literally) refreshing change from another day at the beach. In this comparison, we give the lowdown on the Algarve water parks.