Bull Horn Arena - Levels 433 - 438 (Region 73)
Nothing on the TL Blog about this island, and it hasn't been added to the JM Regions Master thread yet, either. So these are just screenshots from my phone:
Wow, Bean Dog looks awesome as a matador. I hope he's triumphant...that bull looks incredibly fierce! Not to worry. The spectacle at the arena's only part of the fun you'll enjoy on this island of Jewel Mania!
Note: The screenshots are from the Halloween version of Jewel Mania (1.1.9,) in case you're wondering about the Jack o' lantern...or why Bean Dog looks like Elvis! ;)