K. Rool's Keep is a precariously perched, creepy castle that was the sinister King K. Rool's domain situated at the apex of the Crocodile Isle and one of the many locations in the Donkey Kong universe.
Since the castle itself is so high up, the area around the keep is completely frozen and constantly battered by high winds. The castle itself is filled with traps to impede the progress of the young duo Diddy Kong and Dixie Kong. Some of these traps include, but are not limited to, a moving floor, a tower filled with acid that slowly rises, and a bottomless pit located in a dungeon filled with chains.
Despite all these traps and the Kremling Krew forces guarding the castle, the Kongs managed to make their way to the top of the keep. At the top, the 2 Kongs fought and defeated the mighty Kerozene (in the Game Boy Advance version only), and chased the devious Kaptain K. Rool to his aerial gunship, the Flying Krock.
At the end of Donkey Kong Country 2, K. Rool's Keep sinks to the bottom of the ocean, along with the whole Crocodile Isle.K. Rool's Keep made an appearance in Donkey Kong Land 2.
- In the Super Nintendo Entertainment System version of Donkey Kong Country 2: Diddy's Kong Quest, the Donkey Kong Island can be seen in the background as a secret Easter Egg. Also, the location of Klubba's Kiosk on the K. Rool's Keep map seems to be on said island.
- In the original Super Nintendo version of Donkey Kong Country 2, K. Rool's Keep had no boss - instead, Diddy and Dixie found Donkey Kong chained in the last level of K. Rool's Keep, "Stronghold Showdown", from where he was taken to the Flying Krock, forcing the Kongs to give chase. Kerozene was added in the Game Boy Advance remake.
- In the Donkey Kong Country 2 remake, the level "Windy Well" was pushed to the 4th level, making the previous third and fourth levels the second and third levels respectively.
- It is sometimes called "K. Rool's Castle" and "K. Rool's Lair".
- It is also sometimes called "The Kastle", a name shared by King Bowser's Castle from the Super Mario Bros. universe.