Bikini Atoll in Spongebob Squarepants

Bikini Atoll is the signature island above Bikini Bottom. The opening sequence of every episode of the show has the island shown right after Painty the Pirate (a painting) starts off the theme song. Sandy also dared SpongeBob, Patrick, Mr. Krabs, and Squidward to go on dry land here. Some episodes also start off and end with Bikini Atoll shown. To humans (like David Hasselhoff), the island also signals the way down to its aquatic counterpart. The place name is an ironic double-entendre, as the Bikini two piece swimsuit took its name from the atoll, specifically to the connection between the nuclear bomb test at Bikini around the time that the sexy new swimsuit hit the public "like a bomb".