Walk through the 15-meter glass tunnel to watch blacktip sharks and giant stingrays circle above you. The real winners here are the Rockhopper penguins—their feeding sessions at 11:15am and 3:15pm are chaos but worth the crowd. Skip the souvenir shop at the exit and spend about two hours exploring the Sub-Antarctic and Tropical zones. It is the perfect rainy-day backup when the Langkawi beaches are a wash. Grab a duty-free chocolate haul next door afterward.

