The Kon-Tiki Museum showcases the epic adventures of Thor Heyerdahl, a Norwegian explorer dude who sailed across the Pacific on a balsa raft named Kon-Tiki back in 1947. The museum has all sorts of rad stuff, like the original raft and other vessels he used on his wild expeditions. Also great to bring kids!
PS. The Kon-Tiki film from 2012 is fantastic!