In season 1 (bottom four pictures) Spongebob goes to a place called Rock Bottom. In season 10 (top picture), 17 years later, he goes back to the same place and finds the
SpongeBob: Rock Bottom Monster Big And Small by Evanh123 on DeviantArt
SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated: Trailer: Rock Bottom und Übersetzungen
Concept/Set Design for Spongebob Squarepants: Rock Bottom. Artist is Nick Jennings. : r/conceptart