Turtlevania

Turtlevania is a large, hill and forest filled place explored by Mario, Luigi, Toad and Princess Toadstool in The Super Mario Bros. Super Show! episode "Count Koopula".

Not much of Turtlevania is shown though it seems to have a large amount of forests in it, Count Koopula's currently destroyed castle was also located in Turtlevania. Lightning and rainstorms seem somewhat abundant in Turtlevania, as do pink and blue leaved trees.

Trivia

 * Turtlevania seems to be a reference to the region of Transylvania, located in Romania, being a portmanteau of it and the word turtle.